I'm talking about those bags that technically fit the maximum possible dimensions for carry-ons that have gotten really popular in the past few years.
But they allow people to pack very heavy, and most Americans are out of shape. So the plane takes twice as long to board and empty since many people struggle to lift the bags.
That has nothing to do with the bag type, you could just as easily pack 5 bricks in a backpack. And there are weight limitations too which aren't set very high. If someone inside that limitation can't lift up their bag I guess the only solution is to get help from a flight attendant. Otherwise you're practically excluding elderly and children from having carry-on.
They will probably have to lift up the bag eventually, either in or out of the airport. Being unable to carry your things will be an inconvenience regardless of wheels.
Sure but the point is you're trying to inconvenience more people who are already inconvenienced and don't care. Passengers need to be able to lift the bag, not necessarily carry it. Banning wheels means that everyone now has to pack A LOT less because they need to carry it, potentially for a whole day. It's just not worth it.