[gobdovan]

Well, they're a public company. They have to adhere to government-imposed standards (US, EU, and other jurisdictions too). Although I don't think they self-imposed curation, this is their current policy. Some subs get banned for no good reason, even when they were very valuable (e.g., a local financial subreddit was wiped out for reasons unknown, despite providing a better overview of how laws are applied than official sources) so mods inevitably get scared their sub may be next and start being more 'conservative'. This ends up creating hive minds and echo chambers. Anything that would come to replace Reddit (although I don't exactly see what could replace it) will be a victim of its own success at some point and will exhibit the same traits too.