Those are all great examples where I agree that an accommodation seems uncontroversial.
But to quote the article linked in the parent comment:
> The increase is driven by more young people getting diagnosed with conditions such as ADHD, anxiety, and depression, and by universities making the process of getting accommodations easier.
These disabilities are more complex for multiple reasons.
One is the classification criteria. A broken hand or blindness is fairly discrete, anxiety is not. All people experience some anxiety; some experience very little, some people a great deal, and everything in between. The line between regular anxiety and clinical anxiety is inherently fuzzy. Further, a clinical anxiety diagnosis is usually made on the basis of patient questionnaires and interviews where a patient self-reports their symptoms. This is fine in the context of medicine, but if patients have an incentive to game these interviews (like more test time), it is pretty trvial to game a GAD-7 questionnaire for the desired outcome. There are no objective biomarkers we can use to make a clinical anxiety diagnosis.
Another is the scope of accommodation. The above examples have an accommodation narrowly tailored to the disability in a way that maintains fairness. Blind users get a braille test that is of no use to other students anyway. A student with a broken hand might get more time on an eassy test, but presumably would receive no extra time on a multiple choice test and their accommodation is for a period of months, not indefinite.