Big Pistons Forever:
You are correct, although VMC has to be understood as part of the process. A good example of why you are making a good point is a 3-engine ferry takeoff in a Herc. 2-engine Vmca is 136 KIAS with high rudder boost and 166 KIAS with low rudder boost. Rotation speed is less than that, so there is a period of time when the loss of a second engine could result in a failure to continue controlled flight.
Even though I haven't flown a Herc since 1987, those speeds are still ingrained. Like I said above, Vmc has to be understood as part of the process.