Same. And I'm being serious here while it could sound sarcastic:

I feel good knowing I saved the cart return guy 15 seconds. His day will not be improved because he still needs to move all the carts; and when that task ends there will be another. I understand this, but I still feel like I made the place better than I found it. Where I am, it's hot-AF outside right now, so I hope that I'm making the next indoor task sooner and my time is appreciated -- but my time is literally like <1 minute, so I know it's not a lot of anti-entropy.

My math is that, with billions of people on the planet, if even part of us tried to save someone 15 seconds every few days, we could build so much faith in humanity.

OK, so the correct thing to do in this situation is tuck the cart behind or hook the wheels over a parking barrier/curb, or if there's no other option tip the cart onto its back/handle side. Don't just leave the cart loose rolling around. I've seen a gust of wind blow a loose cart into a parked car and smash the brake light cover out.

But also, if you're physically disabled to this level how are you using the shopping cart in the first place?

Or they may be totally capable but it will burn up their energy reserves for the day and have more stuff to get done.

Best not to judge, as you said.

All you're doing is making some underpaid employee's day harder, and causing problems for the other people who have no choice but to shop at the cartel grocer. Guarantee you the company doesn't care and is not even slightly inconvenienced by your laziness, no matter how you try to rationalize it.

You sure showed them! /s