Do many people assume people who use electric carts are also mentally challenged?

We went to Lowes yesterday. My stupid neuropathmic feet won’t let me walk too long, or even just stand too long, and Lowe’s is all of those things, so I broke down and got an electric cart.
Those things are frustrating. Nobody seemed to appreciate my attempts at friendly interactions by playing bumper cars with me. Rick appreciated it, but he kept ramming into me with his shopping cart from BEHIND, cheater.
I noticed that the people I DID interact with seemed to assume I was slow mentally. Don’t even go there people! I’ll get you!!

BTW I’m not overweight at all, either.

What were they thinking?