Cookies aren't spyware. If you want to disable them, disable them in your browser. It is something you send to the server. Not something they do on their end.
The issue is when you want to be able to stay logged in to a site, but do not want Google track you across the internet. Cookies do not differentiate between what they are used for, so sites have to make it clear only if they are going to track you. You do NOT need a cookie banner if you're not tracking your users