People have a hate boner for non-FOSS. There are no other high quality Lemmy apps. Choice is only an illusion. Now go to the app store and download your mandatory Sync app /s
People on the internet tend to latch onto memes for the hell of it. Do they really care about it? Probably not. It's just the topic of the week, like X, Threads, the Titanic, etc. I would hope that people would be a lot less harsh to the Sync developer...I doubt that the people fanning the anti-Sync flames are doing it to try and lower prices.
I log in on my desktop for old.reddit for niche communities. Otherwise its been just Lemmy on my phone ever since we lost the 3rd party apps. I feel like it's been healthier for me as well, not being as addicted to my old reddit feed