It all feels to me similar to how spectators or laypeople judge pro sports.

Don’t quote me on this, just trying to make a point:

They’ll say you need perfect symmetry to do well in sports, which is highly correlated to development stability in the womb; higher symmetry = perfect development.

Then after some years, news will come: Bruce Lee’s one leg is shorter than the other by a significant amount, and Usain Bolt has a similar asymmetrical development.

Then they’ll flip-flop around their initial argument by claiming that they are outliers so the general rule need not apply.

brother just build what you find interesting and it may work :)

It's well established that injuries occur at much higher rates when you have asymmetries/imbalances. Not even just physical "deformities" but just when your body is shifted or twisted in some way such that you don't move with balance.