Just for the record, I know little about gotosocial, but I've looked into Misskey a fair bit and I think it's irrelevant here.
FediDB data on active users seems off (a low ~12k MAU), but even if the real number is much greater, most are on the flagship instance (misskey.io) which has multiple CSAM censures on fediseer.
Put another way, it's almost counterproductive to include Misskey in these topics because simply federating with its biggest instance could be a liability for most 1st world western instances.
I doubt the Swiss government would get much out of Misskey.
I don't know who this person is, but adding "Hacker News" doesn't give their words more credibility. It gives them less, if anything.
Imagine I quoted someone and, underneath it, added:
Both of these enjoy the same level of base, intrinsic trust to me: none.