The saying goes if you’re not the customer, you’re the product. Now, you’re both. Every big social media app is testing subscriptions. It's a business model that comes with a perverse incentive. Just like airlines, if you make life worse, more people will pay.
Also, Facebook groups are now how most extracurriculars are handled in schools, so if you have kids and you want to be involved in their activities you don’t have much of an option.