The number of hours you can practically work is an important factor, as are the risks (illness of various forms, exposure to dangerous customers, ...) that at best further reduce your earning potential for a while or at worse lead to complete curtailment and/or much pain (or even early death).

Simply comparing the hourly pay rate is pretty meaningless when comparing job options like these that differ so massively in other factors.

I'll keep my tech job if it is all the same to you.

(not that I imagine many being willing to pay a good rate for an hour with my physical form, so the choice might not really be mine!)

I doubt they have 8 hour a day booked though :)

in the valley as an "rockstar" iOS developer.

I can sit and code for 10 hours at a time without my genitals aching.

$600,000/yr isn't that outlandish. You just need 30+ reports or do really good IC work