Because we already play other heroes and it doesnt solve the issue our (former) main has.
No Mercy player asked for this failure of a rework yet we had to adapt to its many changes and all those nerfs. A lot of us dont find her new playstyle fun anymore plus all the nerfs make her pretty unimpactful. So now we want another rework because we dont like how they treated Mercy and think she lost a lot of her fun and skill ceiling. Thats why we come up with solutions like this here.