As stated this is not strictly true. E.g., Apple would object (with at least some merit) and every tech company before adtech (i.e decades of commercially viable tech) would object as well.
What is true is that adtech is the most lucrative way to monetize any digital consumer device.
This economic dominance of adtech is real and extremely distortive of the technology landscape but 1) it is predicated on questionable behavioral stances ("consumers don't care about privacy") which are manifestly not universal (see e.g. EU-wide regulation) and 2) is an incongruous and incomplete architecture for a digital economy: e.g., there is no hard line between consumer and business devices. Do businesses also don't care about commercial secrecy?
Effectively adtech short-circuited the digital society motherboard by identifying an emerging opportunity that did not exist in traditional physically organized economies. Large and vital sections of the motherboard (e.g. journalism) are now burned out.
Its a dead end.