I was a gmail user since gmail was in private beta 18 years ago. I never had a phone number associated with it. And yet two or three years ago when I tried to log in Google decided to just... not let me do that, because fuck you, and started extorting me to give it a phone number. If I don't give it a valid phone number it won't let me access my email. But I can't really do that because, you see, I don't actually own a phone number.
So now I'm essentially locked out of my almost two decades old email account, for no good reason whatsoever except the fact that Google is a bully. Fortunately I've long since migrated to another email address on my own domain as my main address, so it doesn't really matter.
Do not depend on any Google-provided service. They don't care about you, and they will screw you over sooner or later. You're just a number to them. Most importantly, pay for any critical service you need (like email). Do not wait until it's too late. Do it NOW.