I guess its all about generational perspective, if I had to have one.... 300 wsm
all the way.
As for more 30-06 dropped Kodiak bears..... Try 375 h&h. Have seen more than a few guide arsenals and the h&h with irons on a Winchester platform has to account for more lead in bears than anything else. Now in the 50's and 60's did my grandfather use a light 30 cal? well yes, but even then the 375 was preferred.
For the gunny to select a 30-06 stand to reason, he is the perfect generation and background for it. Personally don't have one, probably never will, but to each their own.