You're being a bit negative about the TESS launch.
spaceX spot a problem, three hours before launch. And they stop the process long before any loading of fuel or liquid oxygen. It's about the time the humans leave the area of the launch pad. How is this a bad thing? Why should the satellite be "nervous"?
Anyone can check the countdown sequence, find out these things. You don't have to watch launches for half a century to have a clue.
Meanwhile the engineers check the details, and decide whether or not you will go to space today. This is thing going right.
Biting the hand that feeds IT
