I don't think this is something that needs to be debated at all. There's some genuine designs that simply found their way into pretty much anything. Touchscreens existed before they were used in modelers, switches you could as well use as encoders, too (just that they weren't supposed to be stepped on), etc.
If you wanted, pretty much everything could be claimed as being "stolen", regardless at which company you look at.
If we really went into the details, everybody is stealing 1/4" outs (from whomever invented them). Or endless encoders. Or signal flow diagrams. Or iconized representations of whatever.
It's really all about how well you put things to use.