i constantly wonder whether it's worth entering the startup world after finishing my phd, hearing of 'hire fast/fire fast', looking for 'unicorns'....is this ra

i constantly wonder whether it's worth entering the startup world after finishing my phd, hearing of 'hire fast/fire fast', looking for 'unicorns'....is this rat race even worth it? What's wrong with just wanting to solve problems, why do you need to build fast as opposed to building something that's awesome and works well - find a niche and grow from there. I can almost feel the 'pressure of the job' for those engineering the system when reading posts from founders/ceos with regards to recruiting - here's a hint "it's always about finding the right employees" (well no shit sherlock).