[worik]

> but every company in existence does this to some extent

That is untrue.

A/B testing is not the same thing as seeing how bad your users' mental state becomes if you muck with what they read.

A/B testing is a tool. It can be used for good or evil. That was Facebook's choice how to use it.

[s1artibartfast]

That doesn't make any sense. You decide what they read. You would want to know if it's harming their mental state. Closing your eyes to the impact you have does not negate the impact

[danaris]

The problem is, Facebook didn't do it to make sure they wouldn't cause psychological damage.

They did it to make sure they could keep people's attention, despite the psychological damage.

[s1artibartfast]

Is that the stated goal or your projection?