I have used this analogy before. Brewing is like making sauce or soup. You can open a can, add water and you have cooked soup....or you can make your own stock and add ingredients to make a soup from scratch. I always enjoy my scratch made soup a little better, as I added all of the ingredients I like in the amounts I like to get what I like. Both methods are making soup.
My beer is crafted for me, and having the control of ingredients and process is very important to match the beer to my minds eye (and tongue).
Also....store bought craft beer: at least $1.50 per bottle at store ($4-5 per pint at bar prices). Extract brewing: approximately 60-120 cents per bottle depending on OG/IBU. All grain brewing 40-75 cents a bottle depending on OG/IBU and efficiency....this includes grains, yeasts, hops, fuel, caps, corn sugar, you name it (except labor).
Being able to say that: "I made that"....Priceless.
I added a monster mill and a march pump this year and went from efficiencies in the 50's to those in the 80's....I make starters and often repitch yeasts into successive batches, saving even more....I buy my grains in 50 or 55lb bags paying about $0.90 per pound on average......and now this year, growing my own hops from some free rhizomes I got from friends.....I am looking at the lightest beers dropping into the $0.25 per beer range....whoohoo!
Good beer at an extreme discount....and if I want, I can someday afford the Sabco brew magic....(if I don't build it myself)....If I am saving $500-2000 per year on beer.