Yes. That has been part of my point at various points, but I recognize I haven't adequately communicated why. I'll get to that at the end, here.
I think this exagerates things a little. You aren't likely to get the same kind of tension of play, but it's certainly possible, and probably the reverse as well, though I've not tried that. The two are better suited to different foundation-level gameplay ideals, however. Absolutely.
Stuff like vulnerability, though, is a matter of scale and consequence. I think one of the big differences from 4e to 5e is that 4e is designed to do everything it's meant to be able to do out of the box without any tinkering or system mastery, while 5e is designed to work out of the box, but be able to do many different types of things with a bit of system familiarity and use of optional rules and homebrew/3pp additions. So, the vulnerability arguement, to me, applies to 4e vastly more than to 5e, because in 5e it is very normal, as far as I can tell, to houserule things like how easy resurrection is, how natural healing works, etc, and to use different encounter building guidelines than those provided in the book.
Sure. Again, the two have advantages and disadvantages. Some people want to customize their own computer, some people want to open the box and plug it in and be online 5 minutes later getting precisely the experience they came for without any need to dig into how the parts work beyond how to use them. Some people want something in between. Just as one example of the differences between the two.
My point has been, if you enjoy the basic gameplay framework of a game more than that of other games, and you want to add some genre convention mechanics onto that game rather than change to a very different gameplay framework just to get that genre feel, that is perfectly valid and shouldn't be treated as foolish or crazy or as if the person just doesn't know better.
I mean, we got people in this thread playing victim every time someone says that it's totally doable to play horror in dnd, while also advocating for telling people in advice threads that they don't know their own preferences and only want to play dnd because they don't know any better.