I think all sorts of people go for an mba regardless of major. A strong mba program won’t take students without two years plus work experience, similar to when I got mine. We had tons of engineers but also liberal arts, business, students, and the like.
The school I went to (top 30) most recent profile was 5.2 years work experience, 48% business, 3% Econ, 28% engineering.
I looked at a top 20 school and it had 5.3 years, 29% business, 17% Econ, 18% engineering, and 35% humanities, social science and science. I had a journalism and history degree when I got mine.
At some schools they don’t have business. At others, those who don’t get into business study Econ which in many ways is a better major. Nonetheless, anyone can go to b school from any major.