I've been doing the betas on my only mac (and iPhone, iPad, Watch) for years. Obviously my experience won't speak for all, but it has been just fine. And now as a student with Sequoia, there haven't been any issues. It really depends on the software you rely on. A lot of the software I need is available as a web version, and adobe has been fine. For my hobbies, DAWs and VSTs have worked, SoundSource is the only related outlier (and there are test releases in the meantime). Ultimaker, Fusion 360, DaVinci Resolve... all fine.
The early releases (and later releases) are certainly not bug free. I think if you're an enthusiast willing to troubleshoot and report issues, it adds to the adventure.
All to say there's inherent risk, which should be weighed. If you're the type of user who has to ask whether to install, that's where I'd say the default "no" makes sense. If you know what you're getting yourself into, it can be fun.