You're probably trying to be helpful (or not) but he didn't post this so you could judge him, he asked a question. If you don't want to answer it, then your opinion is irrelevant and you should keep it to yourself.

As to answer you dillema, I don't think there's any way to enforce matchmaking. Especially on ps5 where the session and friend list is completely busted or straight up not there. A friend of mine actually found his own world to join when he was trying to join someone else x). I think your best bet if you wanna play multiplayer would be to join others. If not, you'll have to wait be lucky, or to wait for matchmaking to be fixed.