That's not exactly what some people in this thread have been saying though.
The argument has been that the reason for jumping matters. That if a DM agrees with the players reasons for jumping - the character takes standard falling damage. If not, instant death is the result.
THAT'S what I have a problem with.
I don't think anyone has suggested that the DM should have the character die based on a whim, which seems to be what you're suggesting.
That said, I do think that the reason for jumping matters. There are things that are thematically appropriate IMC and things which aren't. For example, you shouldn't swan dive off a 200' cliff onto rocks.
That's an old school approach. Tomb of Horrors, for example, is filled with situations where if the PC so much as walks in the wrong direction - instant death.
5e has shied away from it. Generally DCs and damage are assigned.
If a standard 5e adventure had a woodchipper, for example, it would likely did a bunch of damage (say 10d6) - with the reasoning that 10d6 would kill any regular joe. But that a high level adventurer could figure out a way through it - damaged but not likely killed.
Based on the fact that high level adventureres are not, in fact, average joes.
I disagree. There is precedent for it in 5e. Look at the sphere of annihilation. While a character who touches it just takes damage, a character who leaps into it (knowingly or not) is simply killed. No save. Just nothing.
If an adventure had a wood chipper then I agree there would be damage for being pushed into it. I disagree that passing through it, however, shouldn't result in instant death. There's a difference between the two. The one indicates that you're fighting it. Maybe your sleeve gets caught for a moment and you think you're going to be pulled in but then, wrenching your wrist, your sleeve tears and you aren't.
If you intentionally thrust your naked hand into the wood chipper while it's running, you're gonna lose the hand. IMO any other result would be ludicrous. YMMV
It's your game, play how you like. Especially as long as you're consistent about it.
Yup, same to you.
I'd argue that high level PCs, ones that can take a hit from a cloud giant or survive an ancient dragon's breath weapon - are much closer to Captain America than Falcon.
But again, that's not really the issue. There's no question that a high level fighter has the HP to survive a 200 foot fall. The issue I have a problem with, is A DM deciding to not apply the falling rules because they don't like the player's reason for having the character jump.
I disagree that high level characters are withstanding direct hits from Cloud Giants. As I see it, if they still have HP that means they changed a direct hit into a narrow miss or the like.
Obviously play however you want, but I don't agree that high level characters are explicitly superhuman. Their skill and luck are certainly exceptional, but I see them as Batman, not Captain America and certainly not some weird ablative version of Superman.