Technically what I described wouldn’t silence anyone. It would just give the OP the choice of whether or not they want to see downvoted replies. And if someone didn’t like that feature they could use a client who doesn’t implement it like that.
Discussion
My point is down votes themselves will end up silencing voices that do not deserve it. They can be weapoized by tribal groups.
If you don't like a thing all the power is yours, to block it.