What tools Crosby, Ovechkin, McDavid and McKinnon use is not our concern. Because we are not Crosby, Ovechkin, McDavid or McKinnon.
To be more specific, we are different, especially in power, including weight.
I weigh about 72-74 kg, which is light compared to most NHL players. Leg strength is clearly inferior.
When such an amateur wants to enjoy playing ice hockey, sharpening by the RoH may cause inconvenience. This is because the groove depth and blade angle are inseparable and non-selectable.
We little guys need a sharp angle that bites properly against the ice with poor weight, but we don't need a groove depth that bites deeply. If the latter is too deep, it will cause unpleasant vibrations and loss of control.
The advantage of the flat bottom sharpening is that the blade angle and groove depth can be selected separately. It does not matter whether the blade is trapezoidal in shape or not.
In this respect, flat bottom sharpening may outperform round groove grinding, but it is not inferior at all.
I repeat.
It can be compatible that people of good physique do not need the FBV and that we need FBV.
I just choose not to mention it because I am not a big man, but even a big man may feel the need for FBV in some situations for his own reasons.
You can choose the suitable method that you need.
It is really great that you have no complaints at all about RoH. I am envious. I'm not, which is why I love FBV 100/50 .