I'm not entirely sure I believe this argument that Tiktok is a different level of addictiveness than "traditional" social media (which IMO is a fake distinction with no fundamental difference to "$NEW" social media, but that's a separate discussion). I'd like to see if any data or studies actually suggests the endless scroll of twitter, facebook, instagram and reddit, or the autoplay of youtube, is less addictive than tiktok.
I've certainly seen friends and family compulsively scroll and obsessively check instagram and snapchat in a manner no different than what people are criticizing about tiktok. It seems like people witness their "their generation" using instagram/snapchat for hours on end; then they see the younger generation using tiktok for (the same number of) hours on end, and get the idea it's far more damaging.