I understand. That is probably one of the reasons tennis is not more popular. The scoring can be confusing initally, the rules are not all that clear until you understand them well, and I'm sure that the sport is not as interesting if you don't play yourself.
My wife and I are tennis junkies. It has been our primary form of exercise for well over 15 years now, so we love the Tennis Channel.
Both players are exceptional athletes.
Overall pro tennis has taken a giant leap in the past 10 years both in the quality of players and the quality of play.
One of the top American men currently is John Isner, and he is 6' 9'' (2.06 m). He is probably a prototype for future pro tennis.
Meanwhile their are millions of serious recreational players, and we play in leagues divided by skill level ratings (as determined by actual league match results) and age, so that you are generally playing against opponents of roughly the same skill level.
People that work behind computers can get quite sedentary, so tennis is a fun way to get your exercise, and it is also one of the few sports that men and women can compete at together (mixed doubles tennis is one of the few pro sports in which men and women compete directly with and against one another).
ADG