This is one of those things where there's a danger of seeing it through your values and mindset. Everyone is a bit different.
Some players like training, some don't. Some like going for long runs, some don't. Some like playing matches - even coming alive for them when they don't show anything like that during training, some don't and shrink back from the levels they show in training. Some like structure and tactics, some just want to get their foot on the ball. There's a massive level of repeated selection that gets them to this point. You generally have a bunch of people who are self motivated (the reasons for that can be individual and varied), who can elevate themselves to a high athletic level (through a combination of natural attributes and dedicated training), and have a high level skill set. If they haven't got those things, they don't get to this point.
Some like playing matches, for some it's a thing to be got through. Some will go on to happily play all the way down the levels, even for the dog and duck into their late fifties (Waddle-a-like), some will quit and never want to kick a football again.
Modern football is slanted more to the training, and the taking on coaching messages, and less the loving the being on the ball thing. You don't train well, you wont get to play, and you get selected out. You might have the athletic side, but not grasp the tactical side well - the physical gets you to a high level, but the mental provides a ceiling (Burke). Football teams are machines...with cogs, widgets, and linkage's. If you get pleasure (and many do) from understanding the game and derive satisfaction from positioning, tracking runs, narrowing angles, shutting down options, reading intent, and taking control of the game with those attributes you can enjoy the game without touching the ball. It is entirely possible to have a good game, and not do anything on the ball. And feel good about that.
Generally high level athletes like the exercise based endorphins, and their competitive nature means they enjoy matches where they pit themselves against others. Doing it full time means that in training, as much as in matches, they get the fun on the ball that they might need. But at heart, the repeated selection process means they are fit for purpose, in exactly the same way that racehorses are fit for the purpose of running round in circles with a munchkin on their back.
On the whole players enjoy the process that gets them playing football (it's hard to reach those levels if you don't get something out of it), even if they don't much like football itself (and some don't). That enjoyment can be bitter sweet about some aspects of it. Life is like peanut butter.