Dak
mentat
No it's true. Hockey and soccer are (relatively) non-stop; for the untrained eye things seem unorganized, and it's hard to make out strategies, systems, and/or formations. Football probably has more nuances and unique rules that don't apply to any other sport, but it's much easier to follow at first since it's a stop and start game.
Soccer, hockey, and basketball are all very similar games except they are played with foot/stick/hand, and with basketball allowing full roaming and no goalie for the lack of people in relation/size of goal/ball(puck).
Football is radically different from everything else. There are a theoretically near-infinite number of offensive plays from every legal formation. What makes a formation legal isn't obvious, as more common formations have more to do with success of the play than legality.
Defenses do any number of different things in response, with the same near infinite range of options, no or nearly no restriction in formation or makeup. Even if you play the same general position "WR" or "CB" or "OG" or "DE", the techniques that go with each side of the ball are different, and different again depending on the type of offense or defense, and then again for the specific playbook. On and on.