I don't judge the personal culpability of sedevacantists but their position is objectively, at very best and being charitable, gravely erroneous, and leads to defeatism and lack of action. Summorum Pontificuм was a win for Tradition, period. Archbishop Lefebvre, Bishop Fellay, the Indult traditionalist apostolates, many good diocesan Priests friendly and favorable to the cause of Tradition within the Church, cuм Petro et sub Petro, all played their part in that Glorious Triumph. We need something similar and even better in the future and we will get it if we stay united and pray and work for it.

Not if we engage in the lazy defeatism of SVism. If SVism is Stage 4 Cancer, BVism is Stage 1 Cancer. It is not as bad and certainly can be cured in more cases, yet is bad if it ultimately leads to the Stage 4 Cancer and manifest absurdity of 60-70 years of Sedevacantism.

Will address the other responses later.

What, exactly, would you be working for, in the cause of Tradition? If you cannot admit that there's a serious Crisis going on, or that the Pope is caught up in serious errors/heresies, as are much of the conciliar church, then how can you even work for the cause of Tradition? What is Tradition to you? Is it just the Latin Mass? 

You seem to want to remain silent about the seriousness of the Crisis, and you to want everyone here to do the same. I hope you understand that that's not an option for most of us.