Others have said exactly what I'm thinking, welcome to the age of the micro-startup, 1-3 engineers, designers, product mangers building some very cool, albeit niche products.
Any random guy can copy just about any startup already. It’s the domain expertise and insight into a potential market that builds companies not a few engineers throwing together a react app
Any random guy with a shitload of cash to spend on development. These "few engineers" can cost $1kk annually and if you think some random guy can just throw away such cash then well...
"Domain expertise and insight into a potential market" won't get you a working product that you can sell.
More importantly, accountants, lawyers, sales people and other generic business expenses are now making up a bigger portion of your company expenses than the development process.
