Crum, you don't get the point, do you?
Health is one issue, but ever heard of ecological balance? Overfishing, over-grazing, soil erosion, destruction of land and water resources, "dead" seas, methane emissions, foot-and-mouth, BSE, chicken flu, scabies ... the list goes on and on and on, and fat, rich Americans and other Westerners sit there on their fat, smug asses remote-surfing channels for another pristine nature reserve to target for land-clearing to feed their warped sense of what "health" is.
And I don't care if your ass is only covered with 5% fat or whatever - it's still a FAT ass. Clear your head, dude, and wake up to the reality of the planet you're helping to destroy. You don't NEED meat, any more than a fish needs a f***ing bicycle!
As to the question of why so many vegs look unhealthy - excuse me - do you have statistics for this? - I know a shit-load of meat eaters who look a thousand times worse! It boils down to the same thing for anyone - is the diet balanced? Most people don't know shit about nutrition, so when they go veggie, they simply cut out all the protein (doh!), their diet becomes even more unbalanced and they start looking unhealthy.
Maybe you should go talk to Lisa Dorfman about healthy-looking vegetarians, though - she's competed in hundreds of triathlons, Ironman competitions, pentathlons, etc., and she looks half her age.