"hurt, exhausted and missing some magic" - that's what short rest is for. And also NOT what you are after a single fight, as 5 minute Adventuring Day people claim is happenning.
No. Unless you're playing Deadpool, you do not know hit points, ac, exact stat numbers of your character or exact mechanical effects of conditions applied. And I do not allow Deadpool-like characters on my table.
That's what short rest is for. They can take hsort rests as long as they have hit dice to spend, this is the equvalent of tkaing some time off to recover, like a break at work, so to speak. No works owuld let you work for five minutes, then take 8-32 hours rest, and the rules assume the common sense here - characters are heroes, who want to do heroci things. Not cowards who need to run to town to recover after casting one spell and taking one punch because they need to always be guaranteed to win.
Do you want Kender? Do you want an in-universe explanation why wizard can use a dagger that ties to the history of the war between gods? Because I find that laughable and this is what we get from pretending that the worlds of the game are reflecting the mechanics. They're not, the mechanics are the way the story is translated to the players.