I like justified text. I like making something I look at every day "pretty." It's my page; I can do as I please. You don't have to agree with me. It's a preference. In other news, I probably like foods and movies and books and music that you don't.
If there are any studies that show that justified text is harder to read in general, I'd be interested in a pointer to them out of curiosity; but in my own experience—and I read a lot—I haven't noticed any difference in reading speed or retention, or in eye strain, between justified and ragged text.