You could do that, but then you're being wilfully dishonest with yourself. At which point you'll find that you're not getting any closer to your goals (assuming

You could do that, but then you're being wilfully dishonest with yourself. At which point you'll find that you're not getting any closer to your goals (assuming those who switch out eating sugar for doing exercise want to lose weight). And if you're being (subconsciously) dishonest and self sabotaging, then the level of mind/abstraction this guide targets is not relevant