As they should be, because they stupidly made their lives dependent on a single platform that anyone with a brain could see was likely to run into trouble sooner rather than later.
The lesson for the is: don't put your eggs in one basket.
I listened to the final, farewell videos of several people. Some have leveraged TikTok on other platforms, but for a great many, TikTok was the only platform that let them reach an audience.
TikTok was eating the competition because it was simply better at matching content. It is a completely different beast in that regard.
Calling people stupid who leveraged an unrivaled technology to build a community and/or a business feels particularly anti-human.
I'm not calling them stupid for that, I'm calling them stupid because they didn't have a back up plan. Public policy should revolve around what they need or want (e.g. I'm sure some farmer somewhere could make a sob story video about how growing opium poppy has been so good for them, so heroin shouldn't be banned, but it's not about him).