because part 135 regs let a non- IFR pilot fly single pilot in skoshie weather with fare-paying pax without the skills to recover in the event of IIMC.
FYI: Not quite. As mentioned above, Part 135 does require competency in those skills to maneuver out of IIMC for all 135 rotorcraft ops to include a recurrent requirement. Plus those IIMC procedures are usually listed in the operator GOMs as well.