Player1 - In PnP (and I am playing 2 games of D&D, one of savage worlds, going to join soon anotehr of savage worlds and one of warhammer fantasy roleplay 2ed) you have something called a party through which you distribute the weight of items and can carry everything. More to the point, you get to a town, go to the proper store (and there always is a proper store) and sell everything and they will buy everything.
Let's add to that the fact that walking to a shop in PnP games is as simple as saying. I'll go look for the store, it doesn't takes you minutes walking around in real time.
Yes usually there is inventory management, but the weights are never like it is in UR. You can always carry a ton of weapons and armor and other random stuff. More to the point you can always sell everything to the merchants. Now let's add that most RPGs allow you to have companions to carry even more stuff and what you end up with in reality is a carry weight that it's there just cause. They know that those things are boring and do not benefict the game in any way so they include them and make them not a problem just so that the small group that likes hardcore realism shuts up.
Chimaera - It's not about how much money you can even make. It's about not feeling rewarded to do things. I know that I could go through the game, take only half a douzen guns to sll per place I go to and I'll still earn more money than I need. It's the fact that looting isn't fun that ruins the game for me. Even if I'm getting more money than I can spend I don't care, I still count that money as power and I still want it. I still want the reward for the things I do otherwise the gameplay just isn't fun.