Given this persons experience level and their predilection to "spoofing" phone numbers and related activity - it's entirely plausible that they lied on the resume to get the interview. Or embellished enough detail on their roles to make them pass the resume screening.

If this is the case the gap in skill required to pass a FAANG interview may be too great to overcome in a reasonable timeframe.

Hustle culture pushes the unqualified person changing their life by taking a big risk. But most of the "success" examples are people moving into high turnover, metric driven, entry level positions such as investment advisors performing cold calls, entry level b2b sales etc.