Md driver (and others)
The ILS comprises 2 components, the LLZ and the G/S.
So take the scenario, on departure the ILS is working, and the wx would allow a LLZ minima approach.
So what do you need for your alternate? You are assuming that the G/S fails, in those circumstances, yes the wx is good enough for the LLZ approach. But what is the LLZ fails? You can't do a G/S only approach. That is the reason for downgrading from Cat 1 ILS to non precision and not LLZ only.
If your company or national requirements vary then fine, but I suspect that you either don't understand them or are ill-thought out for the above reasons.