The cup games matter and Foden is under serious pressure to perform in them, as he's got far stiffer competition for a first team place and unlike a lot of those teams City are expected to win every game with something to spare and nothing else is good enough.
Again "City are expected to win every game with something to spare and nothing else is good enough." is a bullshit argument when you're talking about some of the clubs being in relegation battles. You think they aren't fighting as hard as possible for every single point?
Some of the cup games matter (not sure 30 mins against Burton at 5-0 matters) but there's also the fact that we can put out 10 world class players and a kid and know that we can still beat every League 1 & Championship side, which is a massive luxury other clubs don't have.
In the end, developing at a top club like City and developing at a mid-table club is completely different and the arguments have to be more nuanced than "Player 1 has X minutes while Player 2 has Y minutes".
One thing seems to be true though in the end, that an increasing number of our best kids don't think this is the place to become a senior player.