I followed an academic in the old place who wrote on this. I personally suspect we absorbed a lot of anti-Spartan propaganda about their treatment of disability and projected that onto the whole Classical world. Like the Thebans exposing the infant Oedipus, this wasn't meant to be a good thing.

Temples to Asklepios surely had good access and I believe there's some evidence of little trolleys for people who'd lost their legs. I think the one question about ramps to temples is how much they were put there to help get animal sacrifices up, and we're not finding that out in a hurry.

Indeed, and the whole subject is still blighted by the lingering influence of Victorian historians projecting their era's 'shut them away/let them die off' attitudes onto the classical past which was taught as the non-religious template to emulate. (That's before we get to C20 eugenics - shudder)