No, during their last revision before a big build, maybe 10 years or so ago, they screwed up a few things, including the spacing of the headers. That is staying because too many shields have adopted the spacing and will continue to use that spacing for as long as the official arduino uses the spacing.
So you can easily use a proto board to make an arduino shield for UNO but there are plenty of $5 proto shields you can buy. It saves you time to just buy a proto shield with ready made 5V GND in convenient places and some have more features than a plain board with holes on.