It can be quicker, but does it taste better & is the total time invested lower in the long run? You do have to spend a good portion of time planning out what meal you're going to make, go shopping for the ingredients then prepare & package the meal properly so it's ready to reheat later. Also things like diced fresh veggies do not hold up well in the fridge, freezer or microwave.
True. I think it's all about how important saving money is to you. Everyone has a price-effort curve that depends on their financial situation and how frugal they are.