But that was doomed by the design requirements tug-of-war between government agencies, being a bit too early and ambitious, and the drop in flight rate and commercial and defense payloads after Challenger.
Today we've seen incredible advances in booster recovery and reuse in part spurred by learnings from shuttle reuse including the learning about how expensive heat shield maintenance/refitting turned out to be on the shuttle.
(A bit of an aside, but ironically and sadly the Challenger disaster didn't "fail hard enough" to drive costs down or do much to reimagine the shuttle program: that problem was a dumb booster problem that had nothing to do with the shuttle directly and could have happened to any payload. (It was still terrible that it happened to that shuttle and its crew, specifically, of course.) It's curious to wonder if something more like the Columbia disaster, which did more reflect shuttle maintenance issues, may have had an interesting scientific impact if it had "switched places" in a different timeline.)
I wouldn't quite say "covered up" but the damage would have been a lot harder to hand-wave away if this had been a normal mission with all the media coverage those got.
It was worse than that. NASA never received sufficient funding for the STS. So they turned to the miltary who wanted it and were willing to fund it.
However, the military needs were also what made the space shuttle so stupidly hard to engineer. Think about how much harder all of the current commercial space programs would have it if they also had to engineer switching to a polar orbit. That's why the STS has those stupidly big engines.
So, because Congress neither gave the project sufficient funding (would take money from my favorite pork barrel!) nor allowed the project to shut down (don't you dare take away pork barrel from my district!), NASA created a vehicle that killed a bunch of astronauts.
[0] https://www.thedrive.com/the-war-zone/27506/vandenberg-afbs-...