I only want to use it for facebook marketplace, but jeez i didnt know they were taking it this far with this crap...
That's a generalisation.
We have twins, 2 years old.
With kids there's loads of "stuff" that just makes the whole ordeal a lot more livable. Being able to buy all that stuff on facebook and re-sell for the same price has saved us a heap of money. Like thousands.
It's easy to say "oh well you should use whatever alternative platform", but honestly there's just no other ready market for this stuff.