First-mover is an advantage, sure, but it hardly means that anyone who isn't first to the gate is wasting their money.
Anyway, I see downthread that VonGuard has made the silly claim that "Hololens can do everything Magic Leap is supposed to do", so I think it's safe to say that the "wasting money" thing is just a throwaway line that's not based on a lot of actual knowledge in the field. I feel kind of trolled.
I think what's happened is that you meant "supposed to do" as in "it fills the need that ML was aiming at", and I took as "it has feature parity". The latter is clearly not true - ML is supposed to have a very wide FOV, handle the accomodation reflex, simulate occlusion, do depth of field, etc. - none of which Hololens can do.