This imbalance is indeed a big problem imo: essentially any scheme from the site is permitted to be circumvented without giving them knowledge: this can create an unhealthy market dynamics where ads get more aggressive (to generate more revenue per user), every user installs ad blocking software (note that once installed, most users won't ever uninstall ad blockers), and websites are eventually forced to chose from only two models: mediocre service (low operational costs) or paywall.
I personally would gladly accept targeted minimalist ads, which I would prefer to having to pay to access most sites. Nowadays I use an ad blocker though since some ads are far too intrusive for my liking.
I think the whole internet industry needs urgently to discuss mechanisms for this problem though.