Technical cofounders have everything to lose.
If you are any good, you have a job and, therefore, the opportunity cost of launching a startup is massive.
If you are any good, you have a job and, therefore, the opportunity cost of launching a startup is massive.
Most enterprises/jobs prefer the 'surrender your soul' approach to hiring and contracting, partly to eliminate competition from current and former employees, partly because they prefer to get a stable stream of work from you.