Exactly. They piggybacked of lots of compute and used less. There still is a total sum of a massive amount of compute
The model already embodies the "total sum of a massive amount of compute" used to create it; if it's possible to reuse that embodied compute to create a better model, that's good for the world. Forcing everyone to redo all that compute for themselves is, conversely, bad for the world.
We don't make people figure out how to domesticate a cow every time they want a hamburger. Or test hundreds of thousands of filaments before they can have a lightbulb. Inventions, once invented, exist as giants to stand upon. The inventor can either choose to disclose the invention and earn a patent for exclusive rights, or they can try to keep it a secret and hope nobody reverse engineers it.