Oh I agree, just tossing out my 2 cents on the page as the scale of some of the building in it just look off to me, Either that or some of the building in the distance are just enormous
Most of King's Piccolo fight with Goku happens after that particular blast and involved more big ki blasts, so it didn't drain him like it did RoshiHaving also checked out the Piccolo Jr island bust, that also required charge time and exhausted him a lot.
I am so tempted to relitigate Roshi's moon busting but this isn't the time or place.
So they'll have to rely on stats and fortunately, Piccolo and Piccolo are physically quite dramatically above Pre-Shippuden Naruto characters.