"Other" people's time? As far as I can tell, the only other person's time I'm wasting is yours. Want to go ballooning this weekend? We don't even need to bring fuel.
"... if the PHP programmer is better than you."
For every good-to-excellent PHP programmer there is a small army of mediocre-to-bad PHP programmers. You get chefs that deep-fry rubber boots, photographers that can't tell the lens from the viewfinder, and drivers that can't put a car in gear without breaking something.
But it also doesn't help when the programming language tells them that someone somewhere likes to eat overcooked footwear, or hands them a camera which is a featureless cube with two identical holes on either side, or takes away the gear shift and replaces it with a button labelled "Crash".
That depends entirely on which websites you visit.
Sure, but at least you get a chance to see what happened instead of having someone else unilaterally say "Open wide, here comes the news airplane!". Some is worse, but there's the possibility that some will be better.