The statistics are misleading. I can say a bit about Japanese subways; they generally have handful profitable lines (e.g. Midosuji line in Osaka Metro---previously known as OMTB---, or Ginza line in Tokyo Metro) and lots of non-profitable lines. For private subways like Hankyu, the codevelopment of subway lines and neighboring metropolitan area was crucial for their long-lasting profitability (in this sense, Hankyu is not a subway corporation). If we want profitability as a goal, we should just drop those non-profitable lines or subways in general, but of course that would be a public disaster.