People aren't "just fine" about dark energy. It is an entire field of study in physics/astronomy. A problem there is that we are quite stuck; some future experiments might tell us something (if it has changed over time for instance), but theoretically there aren't any stand out answers or ones that can see experimental confirmation soon.

Please read up on Dark Energy. It is quite fascinating that people do not make the connection. Dark Energy was invented because the theory does predict not enough energy. Meaning observation requires there to be WAAY more energy than what the theory predicts!

This vacuum catastrophe is completely different! The theory does predict WAAAAY, I mean WAAAAAAAAYYYYYY more energy than what was found in observations.

Perhaps I should have mentioned I am (was) a theoretical physicist and have worked a little on dark energy. But perhaps you meant the comment to others in general.