Fair enough.

I held on to this possibility for similar reasons for years, but after some honest self reflection I cannot say there would be anyone from my past life who is still important and I have no other means to contact, my Facebook bubble from 10 years ago and more is long dead, i.e. similarly inactive.

Maybe giving people an email address, phone number or username somewhere else via Facebook message before leaving for good could also be a solution.

Be brave, do it. I just did it a few months ago. Just push the trigger and delete it. Let it go. They will of course keep the data, but at least not legally anymore.