So I'm guessing you're a very young person based on how little MMS you claim to have received. Which is fine, it's fair to point out that technologies us old folk use may differ slightly from what the whippersnappers are doing. And there are no wrong answers there, except that it's also fair to point out that when you purchase a cell phone, before you install any apps, you have some ingrained cell phone messaging features. One of which is a messenger app built on top of SMS and MMS.
I've probably sent and received thousands of MMS messages over the years, because it was the primary method for a cell phone user to send a picture to your friends and family. Back in the day, at least, and still today for some. It was also the way that us old folk were able to send group texts at a time.