> Then there is literally decades of over promising on ground breaking discoveries right around the corner (super symmetry, extra dimensions, dark matter).
Suppose all TeV-scale colliders had been defunded in the 90s, including the LHC. Then we would have forever been stuck with the strong suspicion that a Higgs is there, but no proof, along with untested but plausible-sounding well-motivated speculation over what else could be. Is that not worse than actually knowing?