I think it only looks weird here because the text looks dense and unapproachable. Too much text, too little visual breaks. Justification is only accentuating that problem.
Personally, I find well-hyphenated justified text easier to read than ragged-right text. It is bothersome when a justification algorithm puts too much space between too few words, but that's what hyphenation is for. To the dyslexics and others who are distracted by the rivers of whitespace that run through justified text, are you never bothered by rivers of whitespace in ragged-right text?