Whether you are right of wrong you have no right to impose your views on others. Convince them, yes. But I think there is still a long way to go until a majority believe it would work. MMT is irrelevant in this discussion unless you can convince the government and the voters.
I have as much right as anyone else to tell others my view.
Why people can't see that the Bank of England has been merrily creating money for the last 2 decades on the instructions of the government, some £900billion or so, during the GFC, when the pound plummeted after the Brexit vote and during the covid crisis, and that all commercial bank loans are money created under licence from the Bank of England, is a mystery to me, but it is a fact.
As for 'borrowing', that is people's and institutions' savings and investments. They'd be very surprised if their money were to be suddenly paid back to them to 'pay down the debt'. Probably quite displeased, too.
There is no reason, apart from ideology, why the pension triple lock needs to be removed, or winter fuel payments stopped.
MMT is not a 'theory', or a 'method', it is a description of how state finances actually work.