Just to understand your view a little better.....do you actually feel that 5E is very imbalanced in this way?
Of course it's imbalanced in that way (also imbalanced a bit in the way 3e was imbalanced, since it does have a lot of player choice, even if subordinated to DM Empowerment in a lot of ways).
'Very' is, of course, relative. 5e's not so imbalanced as 3.5, for instance, it's not so balanced as 4e - I wouldn't say it's exactly between the two, either.
I'd rate 5e more like the classic game, which it consciously emulates, though for different reasons: The early game attempted to design in a lot of balancing factors, but those mostly didn't work well, so the game was imbalance and DMs handled it/players put up with it, as best they could, because it was all new and exciting and the imitators weren't any better. 5e sought to emulate the classic feel and encourage DM Empowerment, it prioritized balance below that (and not only that), so the game is imbalanced, and it's up to the DM what to do about it - fix it up in the model of 4e or non-D&D games that are intentionally balanced, or run it like the classic game and find ways to compensate for and even leverage imbalance.
Fair enough. I guess this just demonstrates that balance can be viewed differently by different people. Or that there's more than one form of balance.
Balance is a real thing, we can quibble over definitions and opinions about how important or even desirable it is, but that doesn't excuse imbalance...
...In the case of D&D, what excuses imbalance is the long-time fans who absolutely demand it be imbalanced. ;P