I mean... that's kinda how phones work. Really any communication system you have to give out some identifier. For the vast majority of us we know who we're communicating with. If you're that concerned, buy a burner phone with cash or wait a few months. But I don't understand why this would be a big issue. Who are you handing out your number to?
I mean conversely at this point in the spam world I'm blocking anyone who doesn't give the phone number they're sending from. If I don't need to know who you are, you don't need to talk to me.