Many of my friends used to carry 7MM Mags for everything, no more. They still carry them for sheep, goats, deer and caribou. For moose and the big bears they all now carry .338s or .375s, they got tired of having to track down animals. Yes the 7MM is adequate to take anything in North America, but this is not a perfect world and shots are not always made perfect. At least with bigger bullets you can be a little off and still drop the animal. Or at least do enough damage that the animal does not, or can not, leave the area. From years of experience I will not use a bullet lighter than .225 gr, I like 250s better, the heavier the bullet the better I like it. The 7MM light bullets just don't cut it in my camp.
Had an acquaintance in Eagle River that carried a 7MM Mag. He lived nest door to my hunting partner, and he went with us for several years, but never shot anything. Then one year he got the chance to shoot a Moose. I was not there, but my hunting partner was. According to my partner, He took his shot at under 100 yards. Then the moose started running, and was shot with the 7MM two more times. Moose was lost, never found. Next two years my partner avoided him just before hunting season, and slipped out without his neighbor knowing we had left. Then the third year the neighbor came over as we were packing our gear. He asked if he could join us that year. My partner asked if he still carried that 7MM, he said he did. My partner then said he needed to grow up and shoot a real gun and leave the varmint gun at home. I thought that was a bit rough, but over the years I have gotten to look at it pretty much the same way. I haven't shot my 7MM Mag in over twenty years, and have no intentions of getting it out to hunt here in Alaska. If I go south to hunt antelope or mulies, it will be the gun I take. Otherwise it will sit in the vault.