The answer is that art is not a reliable job and never was. This it is not likely to become one. Even if you extend it to writing, making music, advertisements

The answer is that art is not a reliable job and never was. This it is not likely to become one. Even if you extend it to writing, making music, advertisements, taking pictures and making GUI. Unlike these, mathematics (the M in STEM) is almost every other non-physical job that is not data entry. T is the remaining ones that are physical (mechanic, electrician, hydraulic). S covers additionally the teachers themselves, doctors and biologists who don't need as much math. Heck, even modern agriculture. The remainder is probably building, some service works such as sales, nursing, care for small children, purely physical labor, parts of logistics, gardening and forestry.