this is not the case at all, and i'm not sure why exactly its being parroted by people on this forum. these scores are from a synthetic benchmark which test burst speed and they are quite literally in no way representative of real world performance comparing the intel cpus and the A series chips.
there are a plethora of examples comparing same intel cpus in different laptops from different manufactureres where the "best" performing computer doesn't necessarily have the highest geekbench score.
this isn't to say the A series chips aren't powerful, of course they are, but it is not "pretty much" the case that the phone, which runs a stripped down version of mac os as a mobile OS, running one app at a time is more powerful than a laptop which runs a full desktop OS capable of better multitasking and various application support