But you have to have somewhere to start from, and D&D is a fantasy game, drawing inspiration from fantasy literature. Like I said, if you'd prefer your orc wizard get an int bonus instead of strength, read my sidebar and talk to your group. That's what session 0 is for.
But this all goes back to setting.
Why is one setting's assumption the base?
Why is the wizard designed to not benefit from Strength?
Why is the base orc tribal and not based on a modern or ancient civilization?
A lot of people don't use the old traditional setting so baking those ideas into races might not be the right idea for the base game.