True, but fewer will watch the show though, and the movie will generate way more buzz and money. And if they want to keep Cap around in the MCU, one of those 2 should take up the mantle, with the other playing the buddy-cop role. If it happens in the series, the movie will also have to explain it.
They only have Spidey & BP in the works. Guardians is done after 3, Doctor Strange is highly likely but may not even get a 3rd, we don't know what happens for Ant-Man & Wasp, and however long Danvers runs for. Even the Avengers movies are up in the air after this one....unless they plan on doing Young Avengers.