Both SE's and SM's use almost the same clutch. The difference is in how they are actuated. Either way, they are bathed in engine oil, hence a "wet clutch". It has nothing to do with the hydraulic clutch fluid. That is the fluid, DOT 4 Brake Fluid by the way, that fills the hydraulic circuit between your clutch lever (the master cylinder) and the slave cylinder that actuates the clutch plates. That clutch fluid is a maintenance item and should be flushed out for corrosion and contamination reasons. Almost any weakness in that hydraulic circuit (extreme moisture pickup, dirt, leakage, etc) would make it difficult to disengage your clutch. You would have difficulty getting it into gear at a rest, getting into reverse, etc. It would not cause slippage.
What kind of oil are you using in the engine? While BRP simply specifies not to use oils rated SM, a better thing to look for is an oil made specifically for motorcycles with a JASO rating that says JASO MA or better yet MA2. These are Japanese specs for motorcycle oil that insures the oils will perform well in a wet clutch and not cause slippage. If you happened to use automotive oil in your engine, it could cause clutch slippage. If you always have the oil changed by the dealer and he uses the specified BRP oil, then you should be fine.
A good clutch that is not abused (excessive slipping by the operator) should last "forever". A long time. 100,000 miles or longer. Let us know what your dealer thinks.