How do you expect to live out those 30 years without working consistently? Do you have means of enough passive income ?
There's nothing out there that I know that gives you a consistent 6% return and the stock market is a fickle mistress. 2007 to 2009, VTI dropped over 50%. That 1% reduction in drawdown isn't going to be of much help much when your $1M turned into $500K, you'll need a job.
But you stopped working for a while, so now your resume makes you less desirable than the competition and exactly when you need more income (at the bottom of the recession) the job market is at its worst. Likely it took you a few years to get that $1M and age discrimination is rampant in IT, further decreasing your odds of finding that job.
I think realistically, you need a significantly lower drawdown, more likely in the order of 2% or less to weather economic downturns. Without subsidized healthcare, that's going to be very hard to do with $1M, but I think it's doable with $2M.
Index and real estate funds pay actual dividends, which you didn’t mention, outside of just relying on rising share prices.
There are some slightly more advanced ways to generate income like selling options premiums that can generate income when prices are relatively flat.
I think you are right $1m is becoming shallow these days, but that doesnt change the significance of my statement