I think Sedes have this issue too though. "You decide what you can and cannot obey" also. You just do it by deciding who is and isn't pope.
This isn't really true though. As we aren't just picking and choosing what not to obey, but throwing out the edicts of these putative "Popes" entirely and sticking with what was promulgated before them (
generally stopping with Pius XII, although there are definitely some who
do move this cut-off). We accept all that was taught by the Popes from Christ until Pius XII with the
assent of Faith because they come from the Supreme Pontiff (meaning they may not be absolutely binding as dogmatic pronouncements, but are accepted out of obedience due to his position).
The problem, I think, which comes with SV is not picking and choosing, but pushing innovations and novelties, in a dogmatic fashion, as a means to combat the modernist rot.
The criticism towards R&R is that they believe John 23 through Francis are all legitimate Pontiffs, but they do not even give the assent of Faith to all of their teachings. Which is why there is the accusation of "picking and choosing" what to obey, which is not, and never has been, a Catholic position.