I’m a high diamond player. Even I have had games lost by an 80% WR widowmaker smurf absolutely destroying our team with flying hook support headshots at every turn. Hard carries are totally possible. And despite that, I would totally be that exact same 80% WR smurf if I magically dropped to silver. I could climb out of silver on literally any hero in the game bar a few (because I’m bad at them not because you can’t carry on them).