Tom, the reason I mentioned the Olympic factor is that, to be in the Olympics, a sport must have a certain percentage of the overall membership of nations playing it (that is, have a national governing body of the sport). Baseball was held out of the olympics for a long time for this reason (among others). Of course, given that sponsorship of a ‘sport’ can guarantee practitioners in almost any country, you get such silliness as freestyle skiing and rhythmic swimming, beach volleyball, etc., so perhaps it isn’t the best point.
As for basketball, the court measures approximately 100’ end to end. Given that a typical NBA game results in scores of about 90 points per team, at roughly 2 points per successful scoring attempt (time down the floor), and given that success rates for such attempts run about 50% on average, we can conclude that the basketball player, just by running up and down the court, is making 180/2 = 90*2 = 180 trips of 100’, or a distance of 18,000 feet (3.4 miles or 5.7 km) during a time frame of 48 minutes (one soccer half). Add in the side to side, the running around just to get open for shots, or defending against, and you probably get them up to at least 4 mi. or 6.5+ km. Now, granted, they get a 15 min. break between halves, but the pace of play is consistently much faster for the team as an aggregate than it is for a soccer team (the narrow playing area and limited number of players prevents people from standing and waiting for action in their area). It would be kind of like being first or second attacker/defender in soccer for the whole game, always in motion. No, it’s not as energetic as hockey, but then, what the hell is? 
As for American football and baseball, the real question is, do those sports have stops and starts because we don’t like sustained exertion, or because our spectators prefer action that is concentrated, making it easier to watch without missing vital action. I know that, as a trained American sportswatcher (with thousands of hours to my credit
), I find it difficult to watch hockey and soccer for precisely this reason (hockey is easier these days; they have all sorts of television timeouts now). Mind you, I love soccer, but I get squirmy when it is minute 78 and I have to use the bathroom and want a snack and know that Arsenal could tuck it in the back of the net any second without warning. But this gets a bit chicken and egg here. 