No no, if you added social login to your app it's because you're evil. You want to monetize your users, selling their data like it's 2014. You're literally Cambridge Analytica. /s

But security-wise, it is the same.

Not at all. FUD. If you're going to make a statement like that at least come with some facts. There is a massive difference between me getting login permission TO MY OWN APP, and accessing a users facebook account, or masquerading as them on other apps.

...until Facebook mishandles their end, for example, the API.

Which they have been shown to about a dozen times over this month.

I think you have either misunderstood the reports, misunderstand the API, or misunderstand how to integrate it. There is literally no way for me to accidentally steal a users data. You may not like facebook, but accusing me of putting my users data in jeopardy is just fucking cheeky.