  Using a semianalytic code, we show how baryon physics in a $\Lambda$CDM
cosmology could solve the discrepancy between numerical predictions of dark
matter haloes and observations, ranging from dwarf galaxies to clusters,
without the need of nonstandard dark matter models as advocated, for example,
by [Kaplinghat et al., Phys. Rev. Lett. 116, 041302, (2016)]. Combining well
established results, we show, for the first time, how accounting for baryon
physics, in particular dynamical friction mechanisms, leads to flat
galaxy-cluster profiles and correlations in several of their properties, solves
the so-called `diversity problem' and reproduces very well the challenging,
extremely low-rising rotation curve of IC2574. We therefore suggest treating
baryonic physics properly before introducing new exotic features, albeit
legitimate, in the standard cosmological model.
