If you could magically will into existence a coffee shop for free, I'm certain the number of people starting coffee shop businesses would skyrocket. You'd just need to come up with a unique twist to differentiate your shop.
If you could magically will into existence a coffee shop for free, I'm certain the number of people starting coffee shop businesses would skyrocket. You'd just need to come up with a unique twist to differentiate your shop.
I don't think the fraction of people wanting to become self-employed is much higher than in other businesses, though.
A somewhat similar situation exists for small-scale blue collar jobs: hair dressers and nail salons, gardeners, plumbers, and the like. There, too, many young professionals dream of running their own business (I don't have numbers, but it wouldn't surprise me if half the 20-year old employed hair dressers would say they want to run their own shop one day), and it is cheap to test the waters (that sometimes involves borrowing tools or a van from one's employer while working in the weekend 'for friends')
As to the fraction actually making the jump: I wouldn't dare say whether it is higher in software than elsewhere. My gut feeling would say it isn't, compared to the above. It will be different for people working in industries where a single-man business doesn't exist (I work at a shipyard/a post office, and dream of building oil tankers/doing mail delivery of my own one day), but software development isn't unique in that.
Many side projects don't target existing large markets. Bootstrapping is a real thing that people do too, even in large, existing markets.