Yes. Twitter gets shit for borderline bans, but can you imagine if they went in and edited the person's tweets instead? There'd be a riot.

These platforms are not just a playground anymore. Politicians come on and make on-the-record statements on them, the news sources stories off them, etc. Integrity of the record is critical. Reddit jeopardizing that platform is very bad for them and erodes their credibility enormously. I can see major figures declining to perform AMAs anymore based on the uncertainty that someone at the company will get triggered, jump in, and change their stuff.