Modern monetary theory is its own can of worms, but justifying massive spending in one area because of even more massive spending elsewhere isn't solving anything.
Those "practical" results were all due to the spending on technology. None were due to advances in physics, as far as I can tell (that website seems designed to obfuscate not illuminate)
https://interestingengineering.com/these-7-cern-spinoffs-sho...
And i think the ISS was still much more expensive (especially over the years) then LHC/Atlas etc.