If they grow a pair...You did, you said it was simple.
Bombing is not pointless.Nope not really, they can hide a hose pipe under the sand and transport this stuff in civilian cars. You wont properly cut off oil supply with just airstrikes, to do that you need to control the ground. Besides oil isnt their only revenue, they make taxes off a few million people and make upwards of $200 million a year on wheat.