Podiatric medicine has come a long way and continues to become more and more mainstream but we are not out of the woods yet. A LOT of society doesn't even know what a podiatrist can even do. As mentioned on these boards before, some medical students don't even know and don't care to know what our educational standards are like...even at Scholl. There is still plenty of unfair bias towards the profession even though there are just as many instances where DPMs work in harmony with the MD/DO community.
Limb length discrepency is actually something podiatrists see quite frequently and can treat through proper orthopedic/biomechanical care (orthoses, shoe modifications, etc).
Marketing yourself as someone who can "cure" short stature would absolutely set everything we have worked hard for back to the beginning. The procedure is cumbersome and not simple. Anything could happen and it's not worth the risk to mess with a patient's normal bone structure only to gain an inch or two.
As for comparing podiatric surgeons to plastic surgeons there is no comparison. Educational standards at the majority of the podiatry schools are NOT on par with medical school. The APMLE is an absolute joke to the USMLE (the USMLE practice questions I did were better written than the questions on the APMLE exam).
This is all about trying to make easy $$$ on an "elective procedure"...A LOT of it.