Just like it shouldn't take long for a tank crew commander to go from a LEO 1 to a Abrams M1A2 and learn how to effectively fight it right?
And, while the RCAF transitions to new fleets, we still need to maintain and fight the current fleets. The CP-140s, CC150s, CF18s, and the CH146 all still need to meet the operational demand with fewer people due to the retraining on new fleets. The only actual operational aircraft that we have sunset during this period is the CC130H, which should have been gone years ago.
And for the RPAS, that is a whole new capability that is taking away qualified pilots, ACSOs, and ground support from other fleets, further aggravating transition timelines, and depleting the number of trained personnel to do operations.