Devil's advocate again.
The UK entered WWII with, although they had been leaders in mechanisation, close air support and carrier aviation, arguably well behind in these areas because in an over investment in bombing. That is city attacking heavy (Wellingtons and Whitneys) and medium bomders, and conventional light bombers, for interdiction, i.e. attacking rail hubs etc.
This was based on the best understanding of the day, i.e. the doctrines developed by the RAF and sold to the political classes. Tactical airpower, modern armour, and maritime strike were very much lower priorities.
Anyway, long story short, near useless capabilities were over invested in and critical capabilities hadn't even received minimal R&D.
In times of uncertainty it is best to invest in general capabilities and industrial capability, so you are best able to adapt, once you know what you need.
Every useless Fairey Battle light bomber, was a Merlin engine and materials that could have literally been used to build additional Spitfires, Hurricanes or even the original attack version of the Hawker Henley tactical bomber.