Hunter x Hunter 2011

[DarthEnderX]

Where on Earth was it said Killua can't recharge like a normal person, that is, by resting?

Fair enough, but, again, bomb guy's power doesn't run out after a couple minutes requiring the need to recharge.

Of course this is a moot point if Togashi is such a poor writer that everybody can go on infinitely without rest or food... But I want to believe that's not the case.

First, I think you're overstating the issue. There's a difference between "going infinitely without rest and food" and "not being able to make it through a single battle without running out of power".

Second, I think we're past the point in the series where that's an issue. Can everyone do it? No. Can everyone that our protagonists are likely to get into fights with do it? Probably. I mean, Cheetu had a power that trapped an enemy in another dimension for 8 hours, and he was a low-tier enemy in this arc.