I didn't personally think so because SDF is a unix related non-profit that started at the end of the 80s. I think it's normal for people to choose irrational seeming behaviour when it has personal importance to themselves and possibly other members they know in a community. On the Mastodon instance, they also have a quote from Eugen Rochko

"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko