There's just no way I could keep myself up to date with local events without Facebook. I live in a post-soviet country so Snapchat and Instagram are considered pretty niche here so every social event is always documented on Facebook.
I also hold a monthly gamedev meetup, which would be utterly impossible without Facebook. The attendance has grown from 5 to 30 people in a few months and is now helping jump start the game development scene in the country (not because of my meetup).
Despite this, I have a deep hatred towards the platform and can't stand how people around me get locked into feedback loops of endless scrolling. I uninstalled the app on my phone a year ago, kept messenger. Also, I haven't seen the news feed in more than 2 years, after installing a plugin that blocks it. The productivity gains were and still are immeasurable.
I see the platform as a versatile and useful tool to help connect with others and I hope that Facebook will try to improve it and remove some of its ethically questionable features, but it's still evil.
It's a necessary evil.