Agreed, especially as armies become smaller and the earth does not. Doug Macgregors notes on dispersed mobile warfare are worth reading.
However... that does not mean there is a need for large scale airborne or airmobile operations, in the way WW2 played them out and the Cold War forecast.
If you drop anyone anywhere and they get into a fight, they have to be able to win, and break contact to be recovered. Very, very rarely does the risk match the reward.
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