Why didn't they build a healing chamber on Earth?

[Warmmedown]

Are they stupid? Well, Goku is and Vegeta isn't as stupid, but he's the type to not care. They probably never told Bulma about it.
Ok and Trunks blew up Freeza's ship.
In the future I wonder if Goku blew up Freeza's ship when he defeated Freeza on Earth. If Goku didn't destroy the ship, they should have looked inside the ship and found the healing chamber.

They also had years to get the dragon balls. They could have wished for the healing chamber. It would be a medical breakthrough.

 

[Power Level Guy]

Sensu