I've often thought a good share of the electors were far more interested in severing ties with Rome for political reasons than they ever were interested in Luther's theology.
Considering that most of them stayed Catholic through the whole deal? You bet.
I often wonder what would have happened if Luther.
1. Hadn't been used by the Electors
2. Had gotten his desired hearing.
The whole point behind the 95 thesis was a protest over some abuses going on in the area. Most Catholics now agree, that there were abuses. However, the Electors saw it as a chance to finally get the Pope out of the Empire.