I would say that the issue is that your people cannot get to their workplace fast enough during the day. When they do finally get there, the day is almost over and it's time to go home which means they don't produce anything. Depending on what stage of the game you are, you might want to add some better ways for your people to get where they want to go... Landing pads, elevators, teleporters...
Take a look at some of my other posts and see how I have spread out a bunch of teleporters everywhere so that people can get where they want to go quickly. I started with a few landing pads in key places, then added elevators plus landing pads, eventually got rid of everything and only used teleporters.
So your issue is very closely related to Bettina living on top of the Universe Tree hehe.