That's not the big deal. Hulk could be in the MCU without solo movies. We manage to care about Black Widow and Hawkeye by now, and they still don't have a film or TV property focused on them.
Maybe, but it doesn't give the stakes. Movie franchises end eventually. But nowadays (if not ever in the history of TV series) you can never see when the end is coming... and when you do you don't really feel like it (because many times its just a series being cancelled or forcefully concluded).