I wanted to know why is it that some doctors say no to lipo of the stomach with tummy tuck and some say it's OK? I'm confused

Hello dear, thanks for important question.Liposuction and Tummy Tucks ARE routinely done at the same time, BUT certain considerations apply.
There are 2 reasons WHY this is even an issue:
1. Blood Supply injury - The tummy skin has 3 major
sources of oxygen providing arterial blood supply. From the groin
(Femoral) arteries on both sides, from several rows of blood vessels
that go forward through the tummy muscles like a peach orchard
(PERFORATORS) supplying the fat and skin above and from the continuation
of several vessels that normally run under the lower ribs. All three
networks inter-communicate in keeping the skin alive.
When a tummy tuck is done, the blood supply from the groins is
divided followed by the blood supply from the perforating vessels -
leaving ONLY the extensions from the under the rib (intercostal)
branches to supply everything.
With no other Back-up arterial blood supply systems, any injuries or
narrowing (as seen in smokers) in these vessels may result in death of
the tummy skin under the belly button and wound separation.
THEREFORE - while we routinely would do liposuction of the back and
hips we either do not liposuction the areas of the tummy which had been
or will be lifted OR if we do liposuction such areas, the surgeon is
VERY careful and does not liposuction as much as he would otherwise.
2. Operative Time. The longer the surgery the higher
the risk of complications. The most ominous being clots in the deep
veins (DVT) which if they become detached, can travel to the lungs
(Pulmonary embolism) and may even be fatalI recommend to make an appointment with a board certified plastic surgeon to talk about your concern and also for a person evaluation. Good luck :)

Great question. But some self tummy posted photos would also help. The answer has to do with the vascular/blood supply to the most dependent part of the dissected inferior flap of skin/fat. If to aggressive middle abdominal liposuction is done than the inferior flap has very high risks of vascular compromise and necrosis. Most boarded PSs will offer lateral, waist/hip liposuction. Very very few PSs will do middle superior liposuction. I hope this clears up the confusion.