Roland,
The reality is that the RAF do not allow pilots to claim credit for a phase of aircraft operation that requires just as much care as any other. Accidents whilst taxiing are just as serious and seem to actually bring more wrath down on the perpetrators than mistakes made elsewhere.
Your rationale for this situation seems to be - we only claim flying hours because.....we only claim flying hours.
I'm afraid that such logic and the "we've always done it that way" mentality feature highly amongst the reasons that we are still lumbered with all the other RAF-isms that unnecessarily separate us from the way that the rest of the world operate aircraft.