Google’s desperation to show tracked ads is but one vector in the equation which determines longterm viability for watching Youtube ad-free for free. There are also other vectors to consider like the level of obtrusion required to actually effectively adblock-block, and its related effect on the userbase. And also just the level of inconvenience presented by ads, determined by their length, skippability etc.
The proportion of the userbase blocking ads is still relatively negligible, and this is an outcome manufactured by Google toeing the line between too obtrusive and too ineffective. Any measure I can imagine which would actually capture a significant portion of users blocking ads would also significantly skew the balance in favour of obtrusivity, which they would pay for in lost users.
As long as many users are happy to continue being vigilant in blocking ads, IMO this balance will ensure blocking ads will remain feasible.