…if all goes well. If you have to pause countdown of a rocket to check some part, it is “less ideal” if that rocket is in space.
Also, if you have to cancel countdown to try again at a later date, how do you get unstable fuel such as liquid oxygen out? Venting it may seem easy, but it changes the rocket’s trajectory. Even more problematic: how do you get new fuel in, so that you can retry a launch?
…if all goes well. If you have to pause countdown of a rocket to check some part, it is “less ideal” if that rocket is in space.
Also, if you have to cancel countdown to try again at a later date, how do you get unstable fuel such as liquid oxygen out? Venting it may seem easy, but it changes the rocket’s trajectory. Even more problematic: how do you get new fuel in, so that you can retry a launch?