That's not what I said at all. Isolating and killing squishies is a gameplay element. You have something trying to kill you and you need to know how to react in order to not die. There's counterplay though. When the only counterplay is "don't get hit", that's not counterplay. Not getting hit is something that applies to literally everything in an FPS.
Sombra, Tracer, Genji, and Reaper are all short range and need to get pretty close. You can dance around and hide behind tanks to get help.
Phara uses open space to get kills and you can hide indoors. Even if you get hit, a direct Phara hit is like 125 damage and doesn't OTK. You can react.
The snipers don't have counterplay. The counterplay is don't get hit. The counterplay is relying on the enemy to fuck up.
Most ults have no counterplay too. Hanzo's ult is as bullshit as his left click.