I understand your take on "life" but even though I could pay double (triple, quadruple, etc.) what grocery stores charge, I grew up relatively poor and I will always be looking at prices. In addition to the actual prices, I believe inflation is a key parameter to the health of the nation (much as BP and BMI are some keys to human health.) To ignore such things is probably unhealthy. Grocery prices are so key to the national "wellness" (as opposed to cruise ship or Euro vacation costs) that I simply can't ignore them - even though they have relatively little effect on my bottom line.
Having said that, your view is probably healthier than mine regarding increasing prices. You don't worry and I do (which is unhealthy.) But some things in a person's past have a profound effect on their future habits. I will likely take my frugal ways to the grave (I've already planned a bare bones cremation and ashes scattering on the local pet cemetery.) Some things, I don't worry about the prices - but grocery items are not one of those things. YMMV