I have made the point elsewhere.
There are people who still aren't aware of the best ways to save energy. There are effective tips and also ineffective tips.
There are also people who don't see the need to save energy. They can afford the costs of increased energy and can be wasteful.
Winter is coming. There is going to be competition for gas from other countries, driving the price of gas high. The taxpayer is subsidising this cost, through increased Government borrowing.
We could be encouraging people to reduce their energy use - which would be:
Good for consumers who may not be aware of where the energy is going
And
Good for the country as it reduces the amount we are subsidising in energy costs and this money could go into insulation and other energy saving initiatives which would further reduce people's bills. And future costs.
And
Potentially reduce the risk of blackouts as people would already be used to saving energy - as well as a requirement for businesses / councils etc to reduce the energy they use through things such as turning off office lights at night, lowering the temperature of hot water in public toilets etc
All different reasons for reducing the amount of energy we use. Some are motivations for the individual and some are societal motivations.