You misunderstand the key design principles though. They are designed so that people struggle to have the strength of will to put the apps down, because every third thing they click through is generating ad revenue.
Lemmy isn't perfect, but I, like many others, have no issue putting it down when I'm done with it. I personally check it for about 10 minutes when I wake up and before I sign off for the night.
Its worth noting that Lemmy doesn't have an algorithm, it just shows you posts in chronological order (technically not true, as there are community ratios and such, but it's true enough for a general statement).
My disdain for these apps is born from watching family and friends waste days (sometimes 8+ hours at a time) on them, and then often being totally incapable of recalling anything they've watched or learned. It's actively harmful to their health.
I understand your point. I don't agree, but I see what you are getting at.
Addiction and enjoyment are not the same though. The millions of league of legends players are evidence enough of that ๐คฃ
Either way, each to their own. I shall leave you to enjoy something you enjoy, but I still believe it is evil.