I also acknowledge that there is a reasonable debate to be had if the disadvantages to adults and businesses from imposing these rules are worth the harms prevented.
There is also a reasonable debate to be had about the merits of various technical and legal schemes being implemented to achieve these goals.
But this take is neither of those. For one, surveillance isn't the number one harm being prevented (even though, a number of legal codes attempt to make this the case).
As has been pointed out previously, there absolutely can be age verification that is without surveillance. The fact that these solutions aren't always legally mandated and therefore age verification can be used to increase surveillance is a reasonable thing to attempt to amend to the implementations of these laws.