I didn't get the impression they were targeting TikTok as a platform, that's just where this happens to be occurring (statistically so, given the popularity of TikTok). I definitely got the impression the author was focusing on the technology itself, and how trivially accessible it is. PimEyes is actually less accessible than facecheck.id because PimEyes doesnt index social media and has a strong paywall. facecheck.id does not have those guards.

Edit: They were targeting TikTok somewhat in the platform's refusal to moderate this type of content, which I think is a fair criticism and known to be somewhat unique to TikTok. (None of the platforms have perfect moderation but TikTok's is notoriously inconsistent and robotic)