But the real problem seems this tendency to use Facebook for everything, when it's really not the best option for anything. Better platforms can provide filtered options automatically, reducing the work for both parties. I really hope FB starts losing its grasp on the web.
I can't filter by location, rent, rooms, etc. etc. I have to instead scroll through dozens of irrelevant posts, then send a message to relevant ones and hope that I'm a suitable housemate and they reply back.
Meanwhile, on websites specifically designed for finding roommates, I can usually search by location, price, rooms, gender requirement (if any), building type (e.g. apartment, house), etc. etc.
Some people view that relationship as "you need me so come to me" - in my experience, those are the worst people to live with.
I rather like that Facebook lets people act naturally. The people that reply to those lazy posts are usually poor planners desperately seeking a flatmate... so neither group engages with my ads :D