Indeed, and the number of "bullshit-jobs" might actually be grossly underestimated, since I've found in general people will often try to justify the status quo and especially their own jobs. Most people would say a three-card monte street hustler has a net negative impact on society, but the hustler can argue that it's a form of entertainment, that people know what they're getting into, that people are paying a relatively small price for an iconic experience, etc.

There's a large amount of the economy that I'd consider a net negative for society - advertising and the industries created to convey it (radio, TV, most websites), credit cards, junk food, sales, etc. There are also a lot of cases where increased input doesn't seem to make people happier off. For instance, a lot of work goes into making special effects better than they were decades ago, but doesn't necessarily mean an audience in 2021 is going to enjoy movies more than an audience in 2000 did.

As a society we should probably spend a lot more time talking about where our economic output is going, and if it's going towards the things we actually want it to.

Im not personally a huge fan of Facebook, I barely use it, but the fact is I know a lot of people who do use it. I’m in several clubs and societies that use it heavily, and derive massive benefits from it. One society I’m in quadrupled in size after establishing a strong social media presence.

The value Facebook gets out of Facebook may well be obtained in questionable ways, but the fact is the service itself creates tons of value and utility for hundreds of millions of people. And yes I’m sure it causes some harm as well, definitely, but it’s not as simple as you make it out.

Before Facebook, these clubs were still on the internet and had a similar presence using junk like geocities I think. Also email threads and so forth.

Perhaps the utility of Facebook isn't zero, but I certainly think the harm (has led to genocide in some countries like Myanmar) far out weighs the benefits.