I'm not sure where you're getting your $330k take home figure from. If your paycheck direct deposit is $6197 and you get paid every 2 weeks, that's 26 paychecks per year, or 26 * $6197 = $161,122. if your take home pay was $330k annually, your direct deposit would be $330,000 / 26 ~= $12,692.
Also not sure why total compensation is relevant. Of course if you're getting more money you can save more money but we're talking about being a software engineer and getting $6k checks deposited. Some engineers get equity, but many don't, and of those that do get options many don't stick around long enough for their options to mature, and of those that do, only some of them have matured options that have actually appreciated enough to make them worth exercising. I'm not saying equity can't be very valuable, there are engineers out there who've made serious bank with equity, but it is more often than not a carrot dangled in front of engineers to entice them to tolerate their shitty job a little longer. I don't think assuming a $161k/yr check translates to a $600k/yr return is a sound or accurate assumption. It is, however, a common one. Junior engineers fresh out of college are good at math, and they calculate out what their equity should be worth and get dollar signs in their eyes and sign up. A few of them get that, most do not.