For every one of you there is another who dropped out of a PhD program to start a company that eventually went bust and now they are in the same position as you, but without the PhD. Everyone tosses the dice. Everyone has regrets. Don't beat yourself up about it.

Look on the bright side: your PhD is an insurance policy against ageism. When you are 50 you will still be able to find (or make for yourself) low-risk, high-paying work doing neat technical stuff. The VP and C-level peers that you envy so much now will essentially be managers for the rest of their lives.