Nor is this about what opinion one adopts at the end of the day (Father Jenkins vs. Archbishop Lefebvre). It's the REFUSAL to acknowledge the great COMPLEXITY of this problem that bothers me. That's what leads to various disorders.
Bishop Tissier has publicly stated that there's no problem with holding sedevacantism as a private opinion. Archbishop Lefebvre has said the same thing. On the other side, so has Father Jenkins. It's just a question of simple humility and acknowledging that this is not a simple problem.
Humility is the key. Even if you adopt the SV position, like Father Jenkins, the humility to say that it's not clear-cut and to not be dogmatic about it is very refreshing.