Of course they care about the terrain of the debate. I mean they care about both. Their narrow interest is to win elections, which bothers them. Their wider interest though is to govern for the ruloing class and ultimately allow them to maximise their profits. The political mandarins in the tories are not at all happy Johnson is having to emulate Castro (in their heads) to have to stand still in the debate on economic policy.
They love Thatcher not just for winning elections, but for fundamentally altering the political spectrum.
Again, I’m sorry but reading even a basic history of the Tory party would help you understand just how much nonsense this is. The Tory party is the most successful western political party in history because it changes constantly (which has always struck me as rather odd for a ‘conservative’ party, but I digress). They started out as a protectionist anti-trade party, morphed into a populist working-class party, then became a jingoistic semi-socialistic party, then muddled around for 25 years being nothing, then became a radical free-trade party, before slowly morphing into the soapy middle-of-the-road born-to-rule center-right party they are now.
The Tories never put ideology over winning - they’ve understood that you win, then change the country to think your way.