But that's the thing (from my perspective).
If all you have is a hammer, every problem looks like a nail, right? We all are familiar with that saying.
If all you care about is pure optimization, then it necessarily follows that you will keep coming up with the same synergistic combinations to benefit your character from a DPR/ASI perspective. As such, you will always pick the same race/class combination (or within a limited amount) and the same backgrounds (or just choose the "custom" background), and the same feats, and so on.
Just do the +2, +1 of your own choice and be done with it. There, you can have your half-orc wizard with relentless endurance.
But that won't STOP the problem, will it? That doesn't end it. Instead, the true optimizer will then have to squeak out whatever they can from what is left. What racial abilities best synergize with the class? For that matter, what racial feats do?
On the other hand, if you aren't as concerned about optimization (and 5e is very forgiving) you can enjoy the fact that you are playing against type. But you can't play against type- you can't be formally creative if there is no type to play against.
Personally, I don't care if Phoebasss has a table with the same bonuses for all races, but that wouldn't be my table. In my opinion, it would be the worst of both worlds, both less fun for the optimizers trying to gain every little bonus, and less fun for people playing into (and against) formal type and constraint. But I also recognize that I am not Phoebasss, and something appeals to them, in the same way that the flavor of rosewater appeals to some people (but not me).