It’s not a pact to discriminate, it’s that they’re a high traffic area that tries to quickly treat people through the path of least resistance.
That’s great if you have visible, obvious issues like a missing limb. If you have anything internal though, forget it. The bevy of tests they’ll need to determine anything will take multiple days, so as long as you can still walk with assistance they’ll do their best to shove you out the door and tell you to schedule an appointment with your doc, regardless of how much pain you’re in.
I hurt my knee and I couldn’t walk easily even with assistance. They did x-rays and determined it wasn’t broken and said I probably (and that word is important) just sprained it and I would be fine in a couple weeks. The hospital refused to sell me crutches, and when I said I needed them to walk, they told me I could walk just fine because it wasn’t broken. Several months later and I’m still not better and I’ve been told I probably tore a ligament and I might need surgery. Gee, maybe I wasn’t being a dramatic cry baby after all???