Perhaps. Perhaps not.
Perhaps. Perhaps not.
Specifically, the example was that the DM didn't think that the fighter character could actually cause the giant to move. Plausibility is specifically the issue, so one has to assume that the power was not described in a way which the DM felt was plausible.
Specifically, the DM said he couldn't
push the giant. However,
push is defined in the book as being something other than one person physically pushing another. Turn undead also uses the word push, but doesn't involve the cleric walking over and physically pushing each of the monsters. Push is a forced movement that must be away from the source. Pull is a forced movement towards the source. Slide is a forced movement in any direction. Each individual power describes it differently ... and in different situations it can be different things.
Specifically (if one goes by the OP), the DM is saying that the plausibility of the world is more important than the rules of the game. I.e., the sequence of importance is "plausibility then rules". This is the definitive "Old School" sequence of importance.
Except of course, he is not looking at the plausibility of "the fighter forces the large creature to move one square back away from him" and instead looking at the plausibility of "the fighter physically pushes the large creature one square back away from him". He's putting importance of the plausibility of the word push ... without actually looking at the RULE of the word push. If you are ignoring the rule, you can't really be measuring the plausibility of that rule working in the world. He has misread a power and has decided that his misreading of the power is implausible.
Now, in previous discussions (more specifically focused around CAGI), many 4e defenders claimed that 4e could be run in an "Old School" way. Specifically, it was claimed that if the use of a power didn't seem plausible in a particular circumstance, the DM could veto its use. We now see that, for a number of EN Worlders, this statement simply isn't true.
Yes. For a number of EN Worlders, they would not want to be in an Old School game like this. That does NOT mean that it cannot be done. It means that you would have to run it with different people.
In both the circumstances of the CAGI discussion and the OP, the question is whether or not a character can compel a creature to move if the DM rules that it makes no sense for it to do so.
And the answer in both of those cases is "The player should know they are in an old school campaign, so that they can play a non-martial class since martial classes will be the ones that are most often told they can't do that, it doesn't make sense."
Come and get it pulls the targets. So this DM, since they consider push to mean actually pushing, would see that power as the fighter grabbing and moving all those enemies into position ... or perhaps lasso'ing them into place.
IOW, in 3e "5-foot step" can (should) be interpreted as more than one step (and is explicitly vetoed where it makes no sense, i.e., rough terrain), but in 4e that "push" still has to be interpreted as something.
And that something is defined in the rules as forced movement away from the target (with the related things like it not counting against the creatures speed, ignoring difficult terrain, etc, etc, etc). It has to have some cause, but it does not have to be a physical push as the OP said the DM was interpreting it.
It is as much the player's responsibility as it is the DM's (more, I would say) to offer an interpretation that is plausible. Clearly, the OP did not offer an interpretation that the DM found plausible.
Or the DM felt that any explanation other that didn't involve a push wasn't plausible because the power said "push", and thus it means push.
If the "push" isn't a physical push (i.e., the character is not physically forcing the creature to move), then either the creature is in some way compelled to move or it is not. This is exactly the same argument as with CAGI.
And again it becomes "ask your DM if he's playing this old school, if he is, don't play a martial character because you can justify anything with magic, but the martial player has to justify every power he uses."
So, perhaps it is an "apparent lack of familiarity with the rules", or perhaps it is an unwillingness to allow rules to interfere with what makes sense (to the DM) in the game world.
And an unwillingness to let the fighter player know before hand that, unlike non-martial characters, most of his powers will only work some of the time, because unlike magic users, the DM has a better idea of what is plausible for a "normal" person.