just because someone gets paid for running, does not mean they dont love running.
the ones getting paid for running must have some love and passion for running, to run basically about 15 miles a day for 10 years or more, to get that good, and you have to figure most run for years not good enough to get paid.
look at geb and defar before and after races, they are always happy and smiling probably because they love their job.
even when geb dropped out of london, a reporter was talking to him within minutes trying to get geb to make an excuse and geb was smiling and looking happy and basically not making excuses, just saying it was not his day.