I think I've posted about this before, but I've been generating a lot of art lately (Ai and digital) and it made me think of why I'd always prefer that to using actor/model/actress PBs. I thought I'd share.
Real People Puppets
The first thing that has ALWAYS creeped me out about using actor/actress PBs is I'd say over 90% of the MU community uses famous people as PBs, but I'd easily put the % of MUers who partake in TS to be over 70%. This means that they are using a real-person's likeness as a sexual gratification object. It made me wonder what I'd think if I met the person.
"Hey dude, im a huge fan. I use your image to entice others into having cybersex with me, but its okay because its ART" (Airquotes)
At what point is it an unapproved sexualizing of another human being without their permission? If the MU community is the same people who lose their shit playing watchdog for people who are annoying, one would think that not using another human being as a gratification tool would be higher priority. I assume it's no different from Anime: Despite the fact that it sexualizes 10-16 year old girls with fan service and panty shots...."you leave my favorite anime alone!" Anime is largely given a hall-pass on some pretty rank behaviors and I think this behavior tends to be ignored with PBs because "My hobby/story" comes first. Too many people rely on the hobby to find human connection, so like TS=Cybersex, it's just one of those things that talking about would be rocking the boat.
To that, I say...

Rock it.
IT IS A -WRITING- HOBBY
When I started the hobby no one used PBs; they used text description. Granted, I think the use of PBs in the hobby is mostly used like an advertising scheme
"Do you fap to that one girl from that one TV show? Then roleplay with me!"
Or.
"If I use an image of a famous person, then I dont have to be so creative about describing how they look, nor do I have to properly make an actual character. I'll just emulate Rovert Downey Jr"
...which misses the whole point of what the hobby was supposed to be. The amount of this before I ultimately quit the hobby was crazy, and from what I hear it hasn't changed.
Own your content
This is what got me, too. Sure, with your own art (or even Ai) you can actually OWN the material, whereas a good number of PBs used are probably at risk for "cease and desist" as in most cases the photographer or the PBpuppet actually owns that image and how it is used.
Now, this last part is going to sound snide, but it's just me trying to speak plainly and logically:
For the people who have put 10, 20, 30 years into the hobby, and if you want to feel as if you accomplished something other than a revolving cast of closed games and constant slashfic, you really should be attempting to make your own organic content. 30 years of "I sock puppeteered Daniel Craig in over 200 TS scenes" where you used the person's physical likeness and mannerisms isn't actually creating anything, even if you say Daniel Craig is named Steve and is a vampire. The basic building blocks of everything done in that scenario isn't creation; it is emulation, and if the hobby were truly about writing and not about PBs, TS, and constant relationship and coffee scenes there would be more thematic risks, more focus on prose and original concepts, and more games with original themes.
Instead the "bee's knees" is Margot Robbie PB as Emma Frost TSing a Tyler Hoechin PB as Superman on a superhero game where every city and organization (Metropolis, The Green Lanterns, the Xavier Academy) are other people's creations.
Putting it all together in my head, I now see why I didn't like PBs to begin with, and it's not me being some old man shaking a cane at those darned kids.