Then it would be boring as fuck. At least for me. There would be no tension, no thrill, etc, knowing that your good character can be wiped out at any second.

You could learn to rush difficult dungeons or go deep or learn how to avoid certain patterns amd not just stand on the edge of the arena

People still manage to do that though? Get gud I guess.

Resorting to hacks wouldn't be so appealing just because you want to avoid bullshit lag deaths and unfair instapops.

Lagging? Close your client. Hacks don't always save you from lag btw, it's the only way hackers rarely die these days. There's really not many "unfair" instapops in the game so I don't see that as a valid complaint.