Nail on the head. The pension firm guides are all grossly over stated so that people will invest more in pensions! When you main costs, such as mortgage, child care etc are over, you don't need anywhere near as much money. When you retire, your costs also fall drastically, no need for life insurance or income protection insurance, no commuting costs, no expensive coffees or lunches every day, no work clothes, etc. no longer need to pay into your pension scheme, etc.
Cars, mobile phones, utilities, etc can usually all be cut back drastically with shopping around, keeping things for longer etc. You don't "need" a new lease car every 3 years, you don't "need" a brand new iphone every 2 years, etc.
Most people just cut their cloth. Lots of retired people are still actually saving some of their pension income because they have too much income far beyond what they need to live on.