It's a common attitude, not just with reddit or phone apps, but just things in general. "I don't have a problem with it, so why would anyone else?"
I remember when Arkham Knight came out, and it was a complete mess on PC. But it worked for enough people that anyone who talked about what a shitty port it was got shouted down.
A common problem I have with layouts, where there's a common trend of leaving giant swathes of white space on either side of the content (in desktop aspect ratios, at least). Like with the new redesign of wikipedia, or even most fediverse sites. But many (if not most) people don't really have a problem with it. I've even heard people talk about "having to move their head back and forth" to see content on the website. As though they're incapable of moving their eyes in their sockets...
But that's my own personal rant. In general, people are often hard-pressed to empathize with others these days. Not just in their use of social applications, but of most things in their lives.
"Moderate" doesn't necessarily mean centrist or unalienable, it's antithesis is extremist. Being moderate and supporting peoples rights to be who they are just means taking a more practical and slow approach.
You need both moderate and more extreme views of progressivism, otherwise you get drowned in either. They support each other, they don't necessarily oppose each other.