FB messenger is probably more secure than SMS, especially if you use secret conversations (although you lose portability of conversations this way).
Signal and iMessage are my favorites personally.
My security conscious friends already use encrypted channels of communication. It's the ad-adverse and creepy-suggestions-wary that benefit from switching to SMS.
SMS doesn't require an app that requests invasive access to information.
SMS gives the involved operator(s) access to the content. Depending where you are, those may be pretty creepy themselves.
Sure, and depending on where you are there may be strong regulation on what they can do with that data.
It's unfortunate that SMS is generally pretty terrible and has very poor coverage in many areas these days. I get unreliable delivery, out of order delivery, weird redeliveries
I somehow managed to get my _entire_ friend circle and family on Signal. I feel like I should get some kind of bronze life achievement unlock :D.
Ha, I tried and failed to do so. The nice thing about SMS is that it doesn't require an app, or even a smart phone.