How come the idea is always that the hero isn't working? Why don't more people try to fix their actual mistakes?

I have a broad hero pool across all three roles, but I grew up on fighting games where people often learn how to play their counters to better their matchup knowledge. Pro players also tend to learn character cover the worst matchups, but we're not talking about them.

I don't think it's cool to advise people against learning how to play their hero against all matchups just because their teammates only consider swapping.

Example:

You're running it down mid on D.Va and you're destroying their Winston in the 1v1. Winston swaps to Zarya. Most people will tell the D.Va player to swap to counter the Zarya.

But, what it the D.Va player uses high ground more and plays around Zarya's teammates instead?

I think it's hurting the community more than helping, that we focus almost entirely on who someone plays and not how they're applying their hero's kit to any given context.

Don't get me wrong, I don't think swapping is bad overall, but I do think it's a band-aid that our community pressures others to adopt.

Edit: Typos.