I don't use a pump, but I've thought about it. In my case, as long as I can maintain tight control with MDI, I'm staying with MDI.
A pump offers some signficant advantages that may make a difference despite Dr. B's not liking pumps. A pump fine tune insulin dosages and it can accurately deliver smaller doses than a syringe (which is limited to 1/2U). It can generate basal profiles that are impossible to generate with MDI. I don't have a pump now, but in my case I suffer from morning highs (Darn Phenomenon) and there is nothing more that I can do to deal with it except to wake myself in the middle of the night, testing and inject Humalog.
And there are some downsides to pumping. One immediate downside is cost. The "street" cost of pumping is at least several times the cost of MDI. And the reason Dr. B doesn't like pumping? He beleives that over time it causes scarring at a high rate than injections. That after a decade, many pump users have developed permanent scarring that impedes insulin absorption (and makes it variable). I think if you asked many long time pump users, they would probably confirm this. In truth, some of this can probably be prevented by aggressive rotation of sites, but still. And a pump is only as effective as the users. My experience learning to use insulin is that it took months to learn everything. And things like carb counting are not simple things, it takes a lot of learning to understand all the sources of carbs and how to properly estimate the carb content of meals.
Your son is only thirty, he has only been diagnosed a month. He has many years ahead of him and much to learn.