Why would I care if you block me?

Please, by all means, don't care. I, for one, care about whether strangers on the internet try to dunning-kruger me. Life's too short for that.

I’ve used NetBSD on a server before, and it was fine, but like, what reason would I have to move away from Linux?

The same reason why weirdos want Windows users to move away from Windows, I guess. It is lovely to have options, and (given the continuing enshittification of much of Linux, with systemd spreading through the whole ecosystem like a virus, less customizability, more security fails, ...) BSD is quite an appalling option. It runs (almost) all Linux software, is notably more mature (it existed long before Linux and quite a few companies relied and worked on it for decades, making it enterprise-ready by design), has a very nice community (and me) and it runs on old hardware much longer than Linux does; ironically, that's what Linux users think they do better than Windows. Heh.

And the BSDs (I, personally, use OpenBSD on a few servers, only recently started trying NetBSD on a spare laptop) are only a subset of your free alternatives, with Solaris (illumos) and (e.g.) Haiku being two others. There will always be one system that does exactly what you want and how you want it.