It's not a "counterpoint" to the actual answer though, it's a sidenote.
You don't know their circumstances. I can't exercise effectively for various medical reasons so (for now) I only do caloric deficit and intermittent fasting. It's slower than I'd like of course (and slower than OP wants, presumably) but it's what I can do now.
Ah. I remember that from desperately trying to wrap my head around it in Chemistry class. Thank you, it's impossible to search for.