The tire thing you've heard has been started by one article that misleadingly bundled tire and breakpad particles with all other emissions summed up
by weight.
This was extremely misleading breakdown, because it discounted all of the ICE gases that are toxic, but weigh almost nothing, and lighter combustion particles that stay in the air, versus tire particles that are typically heavier and stay on the ground.
Of course worn tires aren't environmentally neutral, but that framing was used as a regressive "gotcha" in EVs vs ICE, without daring to mention any real solutions like reversing heavy macho-pickup-truck and SUV fashion created by a workaround for emissions regulation, or moving freight from trucks to rail.