No, I am not arguing that as
@Flamestrike points out above. In fact, several of my posts contain examples that I think are of the same kind of category as the complications given in the PHB. The distance climbed is categorically different. As well, a DM ruling that distance is the "difficult situation" that triggers a check to climb has to justify that X is an okay distance to climb without a check and that X+1 inch requires a check. This is silly, before we even get into DCs.
Climbing is just a factor of speed and doesn't require a Strength (Athletics) check unless the DM puts it in the context of a difficult situation. Which is easy enough to do and something I do quite frequently. I don't understand the resistance to doing it.
... Of course, nobody is saying they're wrong to do it however they want, but it's wrong to assert they're doing it the way the rules say to do it.
For reference, I'm with you to the extent that I wouldn't call for a check for climbing an 80' knotted rope. (I would call for a check for, e.g., a 1000' rope, and the implication of a sharp cut-off at some distance X doesn't bother me, since I'm never going to have an X' and an X'+1" rope next to each other in the same game.)
Where I disagree with you is your presentation of the "rules". Since the two complications listed in the book are examples, then if a particular DM considers a potentially lethal fall to be such a complication, then, by my reading, the rules
encourage that DM to call for a Strength (Athletics) check.
Sure, you and I might disagree with a DM's call that a potentially lethal 80' fall qualifies as such a complication, but the rules leave the question of what qualifies as a complication up to the DM. So if, for example,
@6ENow! rules that the stress of a potentially lethal fall qualifies as such a complication, I think they're
following the rules to call for a Strength (Athletics) check. After all, the rules don't say to only call for a check if
@iserith or
@Xetheral think a particular complication is sufficiently similar to the two printed examples.
To put it plainly: my claim is that any DM who identifies a climbing complication that
they consider to be comparable in kind to climbing a slippery vertical surface or a surface with few handholds is following the rules if they call for a Strength (Athletics) check.