I run YourDigitalRights.org where we help people delete their personal data, so this is kind of my thing. Meta is in the top 0.1% of companies in terms of how difficult they make it for people to delete their personal data. They are notoriously difficult, and we keep on playing cat and mouse games with them. They just don't want to delete any kind of personal information. In most cases, I recommend going to the regulator, which is almost all cases involved with Meta. In some exceptional cases, going to a lawyer is a viable course of action, especially when any kind of harm is involved. Imagine a case where someone is extorting you or defaming you, and you can't delete that data even though it refers personally to you. So yeah, it's a viable course of action in some cases.