Absolutely true.OptionAlpha uses 70% probability because you are doing 50-100 different stocks. If you are only doing Tesla, and you have 70% probability of success with a narrow spread, it won't be long before you lose your money. The $400 spread isn't about breaking even at $840, it is about being able to easily roll an SP drop down to 690.
Tbh, I was eyeing 890p's for a few weeks while we were still in 1000-1100 territory, not really thinking twice on how close the SP has gotten, and OptionAlpha is all about narrowish spreads to limit exposure.