OK, I am an IDF vet, and there's lots to comment on here.
First, to equate tankers and engineers with jobniks is actually an insult in Israel. Uzis have not been issue weapons for Shirion (tanks) or Handasah (engineers) since maybe the late 1970s. Engineers in IDF service, which is what I did, are Infantry first (Kravi!), with an engineering specialty. We learned about the Uzi in the 1980s, but were only issued Galils and M16s.
Some SF units, S-13 "Seals" I know for sure, were issued AKs, at least to the late 1980s.
Galils are only issued now to reserve units, mainly to those that used them back during their regular service.
M-1 Carbines were never an IDF issue weapon. They were only (and remain) used by some Civil Guard and kibbutz members. I ran a kibbutz armory and had 40 of them. They were used for night guards and field trips.
Galils were actually well-received in IDF service, and well-used. Very solid and reliable, and easy to clean and maintain. In the South, I had lots of sand-jams with M16s, and even a MAG58, but never a Galil. They were however not well-carried! They are kind of heavy and clunky, and painful to run with when slung.