Hasn't it been shown that mass originates from coupling with the Higgs field and it's mass that deforms spacetime? Given the large size of the Higgs boson, I d

Hasn't it been shown that mass originates from coupling with the Higgs field and it's mass that deforms spacetime? Given the large size of the Higgs boson, I don't understood why the lack of gravity in QM is viewed as a problem. Why does gravity have to be fundamental? What if it just shows up right around the same time as electroweak symmetry breaks down?