No I think your fairytale unicorns and candy understanding of the world is.
If you look into it you will see the is something called lawful discrimination which basically means if somebody has a good reason for discriminating against you based on disability that's okay.
Examples being police/fire/army/navy/RAF/etc for obvious reasons, the construction industry (have to be able to keep one hand+foot on a ladder at all times to meet HSE requirements), car mechanic (the customer won't pay extra because you took longer and you can't expect an employer to absorb the cost, etc, etc. The list goes on.