There's a kernel of truth in here, which is that there's an increasing number of (mostly white, mostly rich) kids getting "diagnosed" as "disabled" because their parents are willing and able to pay to shop around for an expensive doctor to say that they have ADHD and thus need double-time on all assessments. This is at least sometimes pretty transparently just a way for some wealthy families to buy their way into unfair advantages for their kids so they can "beat" their peers.
The right response to this is not to make it harder to get a disability diagnosis, though. Instead, we should be trying to design classes and assessments that don't require these kinds of accommodations in the first place because they're built from the ground up with accessibility and equity in mind. That would require us to actually structurally rethink education, though, which we are pretty unwilling to do.