You can have control over right click if you use commands. The command system you are describing is what most of us refer to as the broken sword (baphomets fluch) command system. Left click for interaction, right click for examine/cancel.
Anyway, when I'm talking about using commands, I don't mean like the old retro text/icon "pick up", "talk to", "use", etc. I'm talking about using commands behind the scenes, while the game would still be using the simple left click to interact & right click to examine/cancel command system.
The problem right now is that left click is hard coded into the engine that it is reserved for commands & right click is just right click or cancel if an item is currently being held by the active playable character. There's clever ways you could work around that, but it would most likely require you to do some scripting.