It's not just the switching costs, it's the network effects that are forcing people to use Meta platforms. Once I was moving and needed to sell or give away some furniture, appliances and other items (the alternative would be to pay someone to have them disposed of). The problem is, other than the Facebook marketplace, there is barely a place where this can be done. Likewise, where I live, everyone has WhatsApp and everyone assumes that you have it as well.

Another problem is lack of good alternatives. Meta is making products that work for billions of people. I am not aware of any alternative to Facebook marketplace that works globally. All WhatsApp alternatives are worse in some respect: Telegram doesn't fully support non-Google Androids as it requires Play Integrity, iMessage only works on Apple devices, RCS must be supported by the carrier and until very recently didn't work on Apple devices, Signal and others have too few users and also lack important features such as web client. It is difficult to make people migrate off Meta if that means they lose things that they are used to.