  I study two intermediate luminosity optical transients (ILOTs) classified as
luminous red novae (LRNe) and argue that their modeling with a common envelope
evolution (CEE) without jets encounters challenges. LRNe are ILOTs powered by
violent binary interaction. Although popular in the literature is to assume a
CEE is the cause of LRNe, I here repeat an old claim that many LRNe are powered
by grazing envelope evolution (GEE) events; the GEE might end in a CEE or a
detached binary system. I find that the LRN AT 2021biy might have continued to
experience mass ejection episodes after its eruption and, therefore, might not
suffered a full CEE during the outburst. This adds to an earlier finding that a
jet-less model does not account for some of its properties. I find that a
suggested jet-less CEE model for the LRN AT 2019zhd does not reproduce its
photosphere radius evolution. These results that challenge jet-less models of
two LRNe strengthen a previous claim that jets play major roles in powering
ILOTs and shaping their ejecta and that in many LRNe, the more compact
companion launches the jets during a GEE.
