When in the supermarket there are about 2 aisles that I gloss over now that I previously wouldn’t have. They contain factory made sauces in jars, preserved food in tins, spice mixes and meal “convenience packs”. I do stock up on some tinned foods like tomatoes and certain beans for salads but mainly I skim over the 2 aisles. I can see why you could be tempted by packets of pre-mixed spices for meat and vegetables and jars of sauces, particularly when you’re in a hurry.
There are days when I’m climbing the walls from a teething baby and a cranky toddler that I could be tempted to grab a jar and lash a dinner together and I confess I have done in the past. The problem is that it just doesn’t taste the same, to us, as something that I’ve pulled together myself and there are a large number of preservatives in spice mixes and jars of sauce. Also if I were to use a jar or a packet more than once a week the cost would make a big dent in my shopping budget.