Just like a lukewarm Catholic only needs to see a single priest watching anything on TV as an excuse to maintain one's Netflix subscription and watch ANYTHING it offers, about 2 1/2 hours a day --
Likewise, for those motivated (by convenience, weakness, human respect, worldliness, lukewarmness) to be "accepted" by the Modern World, to have their convenient Mass, any excuse will do. Any pathetic, false, tortured interpretation of +Lefebvre's words will put their conscience to sleep on the issue.
They are just looking for an excuse for their compromise. It's that simple. They aren't going to think about it too deeply. It's just something they will shout at their conscience every time it dares to raise its voice to them.
When it comes right down to it, they are not willing to suffer for Christ, or for the truth. And no, going to an SSPX Mass or being in the SSPX in 2021 does NOT involve suffering, persecution, or any major inconvenience. Maybe in the 1980's SSPX chapels were few and far between, and persecution was everywhere. But not today. The SSPX is practically mainstream accepted now, and there are SSPX Mass centers all over the USA; convenience-wise, it's about 2 steps away from Mass at your local parish. Unless YOU chose to live in some remote wasteland devoid of Tradition (which would be your fault), you can get to an SSPX Mass center pretty easily: for weekly Mass, Holy Days, sometimes even weekdays. It's Vatican II all over again -- "I don't want to give up my regular Mass, so I have to stay. Excuse, excuse..."
Fortunately for me, my heroes left "the Mass" in the 1970s and for some years had *no* option for Mass, until they found a Traditional chapel. They called the Novus Ordo for what it was: not worth attending, even if it's the only option.
Furthermore, I consider that Vatican II must be destroyed.