Great point, Andrew.
Most men comtinue to use their Fusion or Mach 3 razors and shaving gel or foam in cans, thinking DE shaving or Straight shaving is something "old" or something that no longer belongs to modern people.
And what is more unpleasant is that those men are really losing one of the greatest things a man can have: a true, clean and comfortable shave, or what here we call a "wet shave".
If there is no big interest in wet shaving, then it is clear that there is no interest for common stores and sellers to offer shaving item that men, unfortunately, would not buy.
My father used to wetshave with brush/mug/DE
He prefers to use canned gel and Mach 3
He will never go back to traditional shaving