Joe,
Much of what you say is only 1/2 correct which in my book makes it incorrect. Let's start with your assertion that Grizzlies kill far more people than black bears. Bunk. It is fairly even and this includes the Canadian Rockies and Alaska with their high brown bear populations.
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Click on the statistics and you get the names and places as well as descriptions of activities.

That only old and weak black bears see people as food....again bunk. Many attacks are young bears.

The correct response to a Grizzly attack depends on the situation. You have described the classic "momma protecting her cubs" or "protecting  a food source" response. But if you lay down on a bear that is stalking you  :P.........You must determine the situation and formulate the correct response.

To suggest that triple ziplock sealing your odorous foods is pointless is just plain silly. Any airtight odor control is going to be highly beneficial in preventing interest from bears whose world revolves around their nose. If they can't smell it they usually don't find it. The exception of course is where they have gotten food before like a garbage can or the only good tree in camp to hang your food.

I suppose to the uncountable vast majority of people who enter the woods without bear spray and have never had a reason to need it find it easy to dismiss the potential need. I would question the people who have had to pull it out to avoid a possible mauling and find out their opinion.

Yes Joe, I am much more concerned when traveling through Grizzly country than black bear country but I wouldn't take any bear lightly. Knowledge is the key.

I suggest you re-read Mr. Herrereo's book as it seems you have forgotten a great deal of it.

OUCH! OK, I was a little tough on you  ;) but I have noticed if you speak with conviction on this site you better know what you're talking about.