No, it's not a problem. It's your problem if you become entrenched in their (or Apple's / FB / whatever) services.

I have a google account to test my devices / emulators. Never logged in gmail with that account, never will. If they cut it off, I can make another.

Same with Apple. I have an Apple free ID for running virtual machines with MacOS / iOS and that's all. I tell my customers to create their own Apple ID and I deliver them the sources + dev environment and they make their own binaries and publish on Apple store. My job is done once I make the app run on emulators and I tell them from the start of the project this.

I have a FB account to talk on FB mess with parents from school and that's all. I don't even have them as friends there, I am just in 3 lists and that's all.

Also i use protonmail currently as I've started migrating from yahoo 2 years ago (old e-mails still there, I open that e-mail like once per month).

Do the same, you'll be free. Also you can use an e-mail account outside of google domain to actually create a google account, if you really need one.