Exactly the point.
Can’t endorse a process because it produced a favorable outcome in one case or a few cases.
You can’t “endorse a process”, but you can condemn a legal method of redress under the state of Maine’s constitution.
Your reasoning on this appears to be oval - not even rising to the level of circular.
Conversely, I can't say that I'd not endorse a process just because it might, at some point in the future, produce a disfavourable outcome.
Referenda exist as an outlet for the expression of the will of the ultimate earthly source of sovereignty in a representative system - the people.
If the people pass a law you don't like, then you can either lump it, try to change peoples' minds, or move somewhere else. Referenda are a quite legitimate expression of the rights of the people of the States under the 10th amendment.