I disagree. To compete at a high level you cover every aspect of fitness (more than a football player) and could quite easily clock up more running miles in a week than a pro football player.
The impact on muscles is on a far higher scale.
it's an entirely different type of fitness.
A lot of players concentrate on building muscle. In many cases its a vanity thing. Muscular strength isnt particularly useful to a footballer after a certain point. They'd be far better developing their aerobic fitness. Hitting the weights might make them appear to be really fit and healthy, but they're carrying extra muscle weight that isnt helping them during a 90 minute football game where they're expected to cover as much as 10k, usually in short sharp athletic bursts. Similar to hockey players. They play 45-50 second shifts at a time, but it's really high intensity. Physical strength is clearly important to them, but as important (if not more so) is their athletic and aerobic fitness.
Muscle strength really isnt that important for footballers.