Preferred stock by default mainly affects liquidation order when there's no dividend. If the company does very well, that won't be a factor.
https://www.svb.com/blogs/lewis-hower/startup-founders-shoul...Dilution can happen regardless of any preferred stock agreement. The biggest sources are when top leadership exercise huge options packages or when the company issues new stock for sale. If you buy stock or call options you are subject to dilution on the public market too. Under dilution, any investors that negotiated an anti-dilution clause on their preferred stock are the winners, everyone else loses. It's stacked but it doesn't break the game completely.
There's a pretty good chance of failure of this strategy. I've stuck around my company for almost 10 years to hit my FI target, and the first 2 years I didn't get equity by default as an intern. The opportunity cost is potentially huge. However, as an individual there's no way I would have been able to invest at this company at the time I got options. The job has been pretty nice in the mean time. FAANG also would have returned extremely well in that time, but more like 10x not 100x.
Is this an efficient strategy on the risk-reward frontier? I don't know. But sometimes the outcome works out very well. Unfairness in the system is there but not so different than owning any random stock. Fiduciary duty exists.