I also know of no command to abandon the Church's liturgical patrimony.
For over four decades countless petitioners have been turned away by the commands of local diocesan bishops when they have requested to have the Traditional Latin Mass celebrated at their parishes. That continues to this day in many dioceses even after Summorum Pontificum and Universae Ecclesiae.
I question the premise that Lefebvre alone kept the Traditional Latin Mass alive and will gladly pay attention to any evidence adduced that Lefebvre alone is responsible for its preservation.
Where do you see the word "alone" in the article?
Stop making things up.
Likewise, the entire traditionalist movement, beginning with Archbishop Lefebvre, would have “obeyed” the non-existent “command” to abandon the Church’s own liturgical patrimony....