Devil's Advocate: Could that not also be said for many astrophysics discoveries including: - Edwin Hubble's discovery of the expanding universe and galaxies - Kepler's discovery of 1K plus exoplanets - Hubble telescope's ultra deep field
None of these are practical pursuits that provide us with new, widely used technology (or at least investing in them is not the most efficient path to said practical technology). Instead, they provide us context on where we sit in the universe. Starting from Copernicus, the constant realignment of our perspective that we are not privileged observers in the universe (disproving geocentrism, heliocentrism, and galactocentrism), have been essential to the development of modern secular humanism and providing us context on our purpose (or at least an effective tool to knock down foolish purported purposes espoused by dogmatic leaders).
So I guess I am taking issue with your narrowly defined purpose of science. What is an "everyday problem" worth solving through fundamental research?
If however, you include these philosophical benefits of fundamental science, then I agree with you.
"Have we had a case where the Higgs boson changed anything in our life?" I think nails that the reason why we shouldn't pursue a LHC++. It has neither benefits from providing us practical tools or new technologies to advance society NOR does it aid us in philosophically contextualizing where we sit in the universe.