Is that really true on the internet? "Subjecting people" makes it sound so extreme. In reality, all you had to do was hide a few subreddits and you'll never see them again. They were already removed from the frontpage well before any casual user would encounter them.
So by "subjecting people", I don't think you honestly mean subjecting the community to those people. I think you mean that you want to shame the service provider into de-platforming them because you disagree with their views.
You weren't going to see their content on reddit anyway, except due to reddit outrage about how that content was ever allowed on their service.
You'd only find a lot of the things that were banned if you knew where to look.
> You can go to voat and debate white supremacists tho.
I didn't interact with them when I was on Reddit, and I don't care to now. But at least they were in a space where they were frequently challenged by people who did feel like debating them. If you don't want to interact with them, you're free to ignore them. That's why I think it's such a small ask and net good to not de-platform unpopular opinions.