The idea of pervasive spying has been around forever. The want, and why. Apple mainstreamed, normalized the discourse, and demoed the concept of pre-scanning in the face of E2E. Apple provided the answer for the how.
Before that this sort of legislation was just straight asking for a skeleton key or a ban on e2e, many laws still do. Apple trying a thing and failing didn’t fundamentally change anything because these laws aren’t asking for a specific technology, they’re asking to be able to see all your messages no matter the method. That’s literally the politicians level of understanding “want read read messages”.
If Apple had never thought up the CSAM scanner concept they’d still be pushing to just break the encryption. Hell they may even stumble upon the “well just send us a copy or scan it for all these fingerprints before you encrypt it” concept themselves, it’s not really a tough concept.