Sure, pretending that your rent/mortgage payment isn't an expense, and calling it "house hacking", makes it easier to claim a 90% savings rate.
Actually, to me, savings percentage isn't important as a bottom line number. It's just a helpful intermediate number for understanding cash flow. I'm much more interested in net wealth contribution and how that dials up to future plans involving large sums of money (e.g. moving or expanding house, education, letting go of wage income, major philanthropy, estate plans, risk management).