[mindslight]

My concentration is consistently terrible while hungry, to the point that I might as well just consider the time gone instead of even trying to write code or really even think about much of anything. That's my experience.

So while I don't doubt your experience (and it's great that you've figured this out for yourself), it doesn't really generalize into advice about how anyone can simply change their perspective to avoid gaining weight.

[snozolli]

Like I said, hunger pangs were far worse when I was fatter.

That said, there's a spectrum of hunger. Have you ever been hungry enough that you thought about eating your own dog? I haven't, but I've read enough stories of humans surviving terrible conditions to know that it happens.

As for concentration while hungry, that honestly sounds like either a psychological addiction or something physiological like blood sugar levels.

it doesn't really generalize into advice about how anyone can simply change their perspective to avoid gaining weight

I didn't say anything remotely like that.