Earlier quoted context omitted.
I don't agree that it's an ideological argument at all, I see it as a pragmatic perspective on what will 'actually happen' given the arguably 'ideological' stance of this new kind of license. The license are short and powerful ant try to 'make a statement' themselves ... in reality, the resulting behaviour of the community is another thing altogether.
The pragmatic perspective is the one given by the supporters of the Commons Clause. The ideological one is the one given by the Free Software advocates who have longer memories and thus know where this leads. I personally support the ideological position, I just don't think this is the right way to make that argument.
'Pragmatic' is recognizing that maybe what we have today is kind of crap and not perfect, but it's much better than some new pipe-dream of a clause.