It's a simple value estimate. Some things, at least in the moment, appear to be worth having some of your data stolen. Also there are measures that can be taken, such as using adblockers, that minimize the cost.
How is data being “stolen”? All of the data they collect is data which you are freely giving them by using their service, and ad blockers really don't prevent any of that: you're connecting to a Google server telling them where you live, what type of device you use, and what you're interested in. An ad blocker prevents you from seeing ads but it doesn't do anything to prevent resale of the data you volunteer.
You tell me, I was responding to your hypothetical question:
"If you were actually worried about YouTube stealing your data, why do you keep giving it to them by using their service?"
>An ad blocker prevents you from seeing ads but it doesn't do anything to prevent resale of the data you volunteer
True. That's why I still volunteer as little data as possible.
