  I find that an ingredient that was added in a recent study to facilitate the
delayed neutrino explosion mechanism of core collapse supernovae, namely, large
scale perturbations in the pre-collapse core, has a larger positive influence
on the jittering jets explosion mechanism. By following the specific angular
momentum of the accreted mass on to the newly born neutron star, I find that
the accreted mass is likely to form intermittent accretion belts and disks,
although they might lack axisymmetrical structure. These accretion belts and
disks are likely to launch jets, but this can be simulated only if magnetic
fields are included in the numerical code, as well as high numerical resolution
that follows the rotation of the newly born neutron star and the shear in the
accretion flow. I also discuss the possibility that the rotation of the
pre-collapse core is important in increasing the shear in the accretion flow,
hence the amplification of the magnetic fields.
  I call for a paradigm shift from a neutrino-driven explosion mechanism of
massive stars to a jet-driven explosion mechanism aided by neutrino heating.
Such a paradigm shift will bring the recognition that to simulate core collapse
supernovae one must use magneto-hydrodynamical numerical codes.
