What data? Now that people can block the advertising tokens on mobile as of the recent android and iOS releases I’m not sure what the difference is browsing on web vs the app?
Advertising identifiers are just the tip of the iceberg when it comes to data collection. Disabling them (which you could already do in Settings) would barely make a difference.
Pretty outside the scope of this discussion. There are lots of reasons apps exist, Reddit is no different than Facebook, Twitter, any social media app. Heck, Instagram and Tiktok barely even have websites.
I don’t use social media apps if I can avoid it. You don’t really know what information is being collected about you. Even the website collects an obscene amount of information. Combined with the fact that Reddit is full of incendiary content, it’s better to avoid being fingerprinted.