It depends on the size. many countries are just to big and heterodox in their composition... take India as an example: If it only had BOM with an international airport, the capital wouldn't be linked. The South would be neglected, and economic progress hampered.
Similar in the US
Germany (and France) for instance is different. I personally don't see any sense in creating MUC
as another hub, maybe only to ease FRA
. But I know, my argument here is weak, open for every critisicm... it is just more convenient and does influence economic development...
, to answer it clearly: no, it makes no sense to go after a strategy of only having one airport (except countries like Luxembourg
"The earth provides enough resources for everyone's need, but not for some people's greed." (Gandhi)