Ugh, I really hate newspapers and the like that stretch out words and letters randomly just to have it make a perfect block. Random spacing to meet your criteria of prettiness does not improve readability. This person centers too much is his problem, I think. Just left align, read down the page with every line starting in the same spot, stop when done. Yay. Most web readers don't even read every word anyway, they skim, and you are producing something anti-skimmable by not keeping a nice solid left line where all the text starts wherever possible.
Balancing headlines and the like is complete standard everywhere. Abusing letter spacing has nothing whatsoever to do with it and is generally frowned upon. If you see that someone made a mistake.
You are simply complaining about words and letters being stretched too far. If you pick up a random novel, you'll see that paragraphs are justified, through a variety of devices such as hyphenation, letter spacing, and generally microtypography. Most of the time this is done professionally and you have no idea because you don't notice.
