It's uninformed mimicry. Someone very close to me (I won't name names!) bought one and did it the other day for their business and I was absolutely shocked when I saw their draft video. I asked them what they thought the clip was for.

It's a massive trend all over IG and TikTok these days as there's a lot of mobile-friendly consumer gear that brings your Social Media Content up a fairly large way for fairly low cost. Ironically, the mimicry probably spreads because those that know what they're doing partially or fully conceal it which is by definition less likely to be noticed and therefore imitated by first timers/novices.