If you start the slow growth path at 30 and retire at 65 you will overall make more money from that thing vs someone who sells out at 35. There are some catches though. The person who sells out can go on to the next thing which in sum total may be more sell out enough to make far more over their lifetime, while the slow growth plan you are stuck. The slow growth is over very slow at first, you often spend 10 years making far less than someone who is "working for the man", then 15 more years more or less even, and only then start making good money. There is no guarantee that you will be successful, some people spend their entire life making less than they could "working for the man"; others go bankrupt when a new VC competitor suddenly gets better by enough to take your customers.
There is no right answer. VC money sometimes is the best answer - but many people who reaching for VC money when their better long term answer would be to grow slow.