Sunny
Premium
That's a half truth. If the vehicle won they made road-going versions, but if it failed, like the Toyota GT-One, they didn't bother.
Except not. The manufacturer's made bare minimum the rules required them to. The 98 911 GT1 won 98 Le Mans but Porsche made just one Straßenversion as the rules required and it is sitting in a museum. Mercedes CLK LM won the 98 GT1 championship, and again Mercedes made just one road going version that is sitting in some collection/museum. Toyota actually made two "street versions" that is sitting in their museum. And Nissan made one.
A road going 919 would not be any more out of place on the museum than this is.
And here is the single CLK LM road version, sitting safely in another museum -
In the end, they are all bespoke dedicated race cars. Whether someone makes a handful of decal-less jacked up "Straßenversions" to satisfy some quaint homologation rules makes very little material difference to what the cars really are.