Tangential, but I am a little frustrated that I can't sign into one of my google products without being signed into all of them. I get so nervous any time I sig

Tangential, but I am a little frustrated that I can't sign into one of my google products without being signed into all of them. I get so nervous any time I sign into google music somewhere that I'm not necessarily actively monitoring because it means someone can just type "mail.google.com" into the browser and basically unlock my whole life. (I'm not making any statement on apple or apple vs google)