There could be qualitative benefits and I think this is why a lot of people go this route. Things like less structure and a bigger feeling of impact.
But your equity is most likely going to be worth exactly $0 and the upside isn't really that high. For every Craig Silverstein there are 100,000 people who got nothing. Look back at any HN thread where people are asked about their exits (as an employee) and it's sobering. $10-20k after 4-5 years is disturbingly common.
A first employee if they have a lot of pull might get what? 0.5%? Maybe 1% if they're a rock star? It gets worse than that because your equity and founder equity (let alone the investor's equity) aren't the same. Theirs will have things like liquidation preferences and participating preferred. Yours may well just disappear on dilution or the kiss of death: a down round.
If your startup gets bought in the sub-$100 million range, the acquirer might avoid paying out employees by giving signing bonuses to the founders to join as VPs and pay out the investors while paying pennies on the dollar to common shareholders. This may have changed but there were rules around acquiring companies for less than ~$60 million that meant it was much better to buy the company for $60m and pay founder signing bonuses for another $40 million rather than acquiring it for $100 million and that $40 million difference is coming out of your pocket.
On top of all that, you, as an employee, will have very limited opportunities to liquidiate your equity prior to an IPO that will probably never happen (you'll get acquired instead and that company may well be public). Founders and investors may sell some of their equity on future rounds. Sometimes employees will have access to this but often they won't.
Now compare this to the FAANG path. It's pretty easy to get to $400k+ total comp for really not that much stress and very little uncertainty. You'll never make $100 million this way (unless you become an SVP+) but let's face it, your startup isn't making you $100 million either.
Honestly, things like this read like VC propaganda just trying to keep the pipeline of warm bodies fed. Outliers are used to sell this well I have some outliers too: Jeff Bezos, Larry Page, Sergey Brin, Steve Jobs and Steve Wozniak. None of them worked for a startup first.
The power of anecdotes and survivor bias.