I think there’s a difference between something just being a bit addicting and scientifically optimizing something to be addicting. Differences in magnitude do matter because there are thresholds in almost everything where a thing becomes harmful.

Coca leaves can be chewed as a stimulant and it’s relatively harmless, though a bit addictive. Extract cocaine and snort it and it’s a lot more addictive. Turn it into freebase crack and it hits even harder and is even more addictive.

If this is coca leaves, Twitter is cocaine and TikTok is crack.