This post is super wrong on way too many levels, and it's an example of spewing second hand information and gaining no knowledge for yourself. I'm not bashing you, and I won't start a war, but let me cover some of your comments:
-I've lived in CA for 22 years, attended a top of the tops university in CA, volunteered hundreds of hours in it's HUGE academic medical center and found DOs all over the place. In fact, the head of the emergency department (Chief of Emergency Medicine) was a DO from CCOM. Great guy, fantastic doctor. You need to remember that you don't have to do a residency in CA to practice here. A lot of people do, and it's bc they were born and raised in CA and want to live here during/after residency. You could do an AOA residency in gas, derm, surgery, etc and move back and practice anywhere in CA or NY. Also, about the hospitals in NY ... they are notorious for being one of the only places friendly to Caribbean grads, and with good cause. SGU paid one hospital there MILLIONS to take their students for clinicals.
-You are falling prey to a similar trap again. Most people think MD school = connected to a big university = our own hospital to play in ... this is not the case. A lot of PRIVATE medical schools (MD or DO) suffer from this problem and do not have their own university hospital. So what they do is set up good relations with med centers (et al) and do clinicals there. With people now a days paying 200k and busting their arse to go to med school, kids are smart enough to attend schools with solid clinical rotations. The internet, word of mouth, and evolving applicants has killed the ole you'll have to live in 19 states to finish 3/4th year, and I personally ranked clinical rotations as one of my top priorities in selecting a school. IE pay attention to it, and you'll find a school that is set up for this kind of thing well.
-Finally, you comment about specialization. First, a small comment ... anyone who completes a residency has specialized. This can mean that they specialize in primary care or internal medicine, but they still specialize. Furthermore, take a look at some match lists. The days of DOs all becoming primary care docs are long gone. DO match lists are filled with gas, surg, ENT, rads, etc etc , just the same as MD schools. Also, take a look at the HUGE number of people who still go into primary care from MD schools. Just the other night I was looking over the match list from Creighton University (a MD school) and found good numbers of specialization but also tons of family med, internal med, peds, and ob/gyn. I really think match lists (in terms of specialization) from DO schools hold their ground any day of the week.
Hope this helps!