It is somewhat, because you then have to say you respect their right to the IP, but don't respect their ability to sell said right.

You can make that argument, but you need to actually do so and not just leave it unsaid.

The distinction is that people respect people who make things they like. That's good, and noble: no matter what kind of topsy-turvy economic system you live under, making stuff is a valuable (not always the most valuable, but valuable nonetheless) skill, because people need and want stuff.

People who merely buy stuff to extract rent from it are, at best, a necessary evil. There's nothing admirable in rentseeking behavior. It's just playing the game.

If we're hanging around a campfire in the paleolithic, the guy who figured out how to make beer is going to be everyone's best friend. The guy who won't let anybody drink from the stream because it's "his" is liable to meet an unfortunate end.

I think the difference in sentiment is between "I created this and I would like to continue deriving benefit from it" versus "we bought this and we would like it to retain its value". again this is not about the legal difference, just how people personally feel about it.