It seems some people feel quite threatened about the return of the Mass according to the 1962 Missal. Why they feel threatened about it, I can’t say.
They don’t like it, and they fear it will replace their preferred vernacular mass. So its not enough to just be magnanimous towards those who prefer the TLM. They feel that, out of a sense of self-preservation and self-interest, they need to oppose and deride the TLM.
As to whether “few Catholics prefer the TLM,” I suspect that honest polling of those who grew up with the TLM will consistently find that 5 to 15% desire a return to it.
I suspect that a polling of weekly mass attending Catholics will find that 2 to 5% of the general Catholic population desires access to the TLM.
I suspect that these numbers will grow with time, not shrink. Practicing Catholics try to be obedient and do not usually resist their pastors and bishops. Their pastors and bishops have told them for 40 years that they were being “bad” or “disobedient” Catholics if they openly expressed a desire for a return of the TLM.
Now that they can no longer be coerced into believing they are being “bad” or “disobedient” Catholics if they openly express a desire for the TLM, they will start expressing that desire. But it will take a little while longer yet before the stigma of that desire (rightfully) fades, so the demand for the TLM will build slowly.
The Cardinals, bishops, and priests held that stigma over the heads of Catholics for 40 years, and it has only been lifted for 3 months. You cannot expect the laity to know they have this right when Cardinals, bishops, and priests openly continue to try to undermine Summorum Pontificum, and you cannot accept at face value the claims, by the same Cardinals, bishops, and priests, that there is no demand for the TLM and none to be forthcoming.
By the way, if only 2 to 5% of American Catholics desire the TLM at present, that is still between 1 and 3 million of the most committed Catholics in the Church.
Those today who are self-described as “conservative Catholics” will almost all be TLM attending Catholics in 10 to 20 years. That is the natural trajectory of those honestly seeking truth and holiness.