My story is less interesting, but I also remember quitting Facebook when it started to taunt me with photos of a past relationship that I wasn’t completely over

My story is less interesting, but I also remember quitting Facebook when it started to taunt me with photos of a past relationship that I wasn’t completely over yet at the time. Stuff like that has to be common. Did the “growth hacking” cynics who design these features not realize the harm they cause, or is the generated “engagement” still worth it in aggregate despite a few lost users?