> Saying OOP is more popular because it just came first is a complete misunderstanding of history.

No it isn't, because the history relevant for this question doesn't begin at the very start of programming. Most programmers active today didn't go to university in the 60s. In the timeframe relevant to answer this question, the people were indeed confronted with OOP languages, and FP languages were already a niche topic, end of story.

This also coincides with programming, as an activity, massively gaining in popularity across many industries.

I'm going to guess that most programmers active today didn't go to university in the 1980s, either (that would mean they were born in the 1960s, which would put put their current age somewhere in their 60s). So there's no point in ignoring the 60s and starting history during the 1980s when most programmers didn't start programming until later decades.

There's a difference between saying "for most active developers, they learned OOP first" and "OOP came first"