Yeah, but with most genres, you typically don't find them isolated to such small BPM ranges (I see on this guide ranges as low as 2 BPM). Most genres have a much wider range, eg ~10-ish or more BPMs. I really don't think it's accurate to limit these genres to such a small range, when a genre is more about the specific sound and style of a track.
Yeah, I'm not saying all the genres operate the same with BPMs. Compared to most house and techno events I go to, I do feel that psytrance events are a bit more "unrelenting" in bpm where I wish there was more variety.
Source: DJ for ~25 years.