There's nothing wrong with using Reddit, Twitter, and other mainstream site still while being active on fediverse.
I see a lot of posts on fediverse trashing reddit, Twitter, spez, musk and so on, and rightfully so. But like it or not, the mass majority of users on the internet still use these sites, and some of us still want to interact with the friends and communities we are a part of on those sites. And there's nothing wrong with that either.
Personally, I want fediverse to grow, and I post on kbin and mastodon constantly, and try to grow the communities on them. But I still pop over to reddit for r/splatoon, r/casualconveration, and my hometown sub, because either the communities haven't grown enough here yet for constant fresh content, or the content is different enough between both to justify me checking in.
I get many are here as a protest against reddit, Twitter, or where ever else you came from, and that's valid. But there are many of us who are simply casual users who want to include fediverse into their drives of other social media, and that's totally fine too.
It's okay to still use these sites, I'll admit that right now, I have a reddit account again. But that's out of spite for the simple fact that I refuse to have my voice be silenced. I may have been banned multiple times on subreddits and reddit itself for petty dumb opinionated reasons (no I'm not a racist, sexist, bigot...). But, I kept coming back because again, I refused to be silenced and let them have the 'victory' of snuffing a voice out.
It's another thing though, to have a Reddit account and going around to people wanting to be done with Reddit, by trying to convince and lure them into coming back on here. People have made up their mind about Reddit and everything that has happened within the past two weeks, cemented those choices. Quite frankly, if you ask me, getting blown up over the porn/NSFW situation is a little silly in comparison to the third party issue.
People have an assortment of reasons to still use these platforms, it's fine, except the ones who're Pro-Spez, Pro-Musk .etc Then I say - you have problems.