4 things
manufacturing in the UK is a fraction of what it was even when the last labour government came to power never mind before thatcher
For 20 years we have as a country fetishised business and financial services above ‘the real economy’ when its arguable if it is socially useful
manufacturing keeps getting more and more productive so it employs less and less people for the same output which means that manufacturing is a far less prominent in many peoples lives than it used to be. You are less likely to be in manufacturing or have a mate or their dad in manufacturing than you used to.
If you take the long view china are trying to shift to consumer economy and be less export led, India will follow etc. and they will be less able to compete with us on cost meaning that manufacturing could reshore back to western countries and of those western countries how well placed does the uk want to make itself compared to germany or USA etc.