The skills weren't lost, just no one wants to pay for them. If ten people can build ten houses in a year, but to do decorative houses they can only do five, hey suddenly the masonry costs on your house have doubled.
> You basically can't get brick work of a quality comparable to what was done 100 years ago any more.
Bricks were mostly used structurally a century ago. In about the late 1930s, most brickwork started being veneer (non-structural). Combined with dramatically increase labour costs as a proportion of overall building cost, it's pretty clear why.
If you want some decorative brickwork done, order a pallet of brick and some bags of mortar and learn how to do it yourself. Anything else is reserved for those with money to burn.