The RN wanted a new carrier in the 60's - and to begin with it was accepted. That changed with a new government which thought it could do the same with aircraft - first TSR2 - scrapped, but replaced with the US F111's ordered as cheaper - also scrapped because the aircraft could not do what the TSR2 could have done! However this was all due to Post-East-of-Suez policies with changing values resulting from the Cold War.
However, without the 'through-deck cruisers' the Falklands and several other campaigns would not have been possible.
Missile submarines are only useful up to a certain degree, and the number of small-scale actions evolving are better dealt with by mobile airfields - not necessarily as large as QE & PoW.
As to the EU withdrawal, I agree it is not the best decision - and the direction it is taking is not good for either side. But the EU desperately needs reform from Brussels to Strasbourg, it needs to get away from a Germany/French hegemony where everybody else first learns what has been decided behind closed doors from the newspapers next day.
I could go on …. but wont.
As to the Health, Boris promised that the monies sent to EU coffers would be spent on the NHS - but that was a politician on campaign
End of subject