I’d say it depends on your situation, as @LTS_Tom owns his company, it’s not like he will get a promotion or needs to justify giving himself a pay increase. I suppose he could have it as a business benefit on his website showing certifications but he clearly demonstrates his knowledge in his YouTube videos.
Haven’t seen much call for unifi certifications (in the UK anyway, then again as a business owner myself I don’t apply for jobs too often ) but I guess it does show a basic grasp of what you’re doing with regards to unifi software.
I always tend to take certifications with a pinch of salt, just because someone has a piece of paper saying they are competent in that field, usually doesn’t equate to that. I certainly don’t look at the certifications to decide whether to give someone a job or not. Having worked with many MSCE guys that struggle to install windows on hardware they haven’t used before. In the same boat, I’ve worked with many guys who are self taught who are amazing at what they do.
Depends on your own situation and experience I guess. Not easy to answer as a business owner not being in the “jobs” market unless there’s a direct benefit to his business from having it.