I feel like for most people, the idea that lifting will always burn more calories than cardio only extends to how often you should be lifting... I've stuck to 3 days/week for a few years and I know as you get more advanced you'll potentially lift 4 or 5 (or 6?) days a week.
At some point you can't just say, lift in the morning, then replace that afternoon jog with more lifting... and instead of cardio on your off day, just lift more.
I think that's the point being made, outside of age or whatever.
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