Exactly! There is no genetic, organisational or intellectual block to creating officers (and thus and army) skilled in both Combined Arms Warfare/Counter Formation and COIN.
The UK had an entire generation of Officers, who were skilled Combined Arms men - Germany and COIN -Northern Ireland practitioners. We got this purely by accident and ad-hocary. We should (and are apparently failing) to be able to do it by design.
What is lacking is an "This is X and this is Y. You must be good at both" approach to professional military education.
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