The Higgs boson is an essential part of the analogy to the Meissner effect in superconductivity that leads us to an excellent understanding of the masses of the electroweak gauge bosons W as consequences of electroweak symmetry breaking.
Each second, some 10 neutrinos made in the Sun and about a thousand neutrinos made by cosmic rays in Earth's atmosphere pass through your body.
Neither quarks nor leptons exhibit any structure on a scale of about 10 cm, the currently attained resolution. We thus have no experimental reason but tradition to suspect that they are not the ultimate elementary particles. Accordingly, we idealize the quarks and leptons as pointlike particles, remembering that elementarity is subject to experimental test.