Toolshedding is a perspective of the person behind the screen.
If you are on the side trying to take a base, and you have many guys wrapped up fighting to gain air superiority, you have guys taking off and vulching the troops.
Often times the guys trying to take the field wind up having to take off and fly back creating a daisy chain grinder effect. In my playbook, if you don't get the base in the first 10 minutes, let everything reset and try it again later. Many of the FSO squads are mission oriented. As in real combat, you have to knock out comms of the enemy. Since we can't do that here, the next best method is to get in as quickly as possible and wipe the hangers out rendering the immediate comms useless. Then go to work on the take.
The dynamic of the fight evolves depending on the situation and circumstances. I personally prefer adapting to a situation as things change. I will defend as long as possible as well as go on the attack.
But my personal opinion is that taking a base down isn't the true definition of toolshedding if it is an effort to take a base as there is usually an effort to resupply the base and town to make it immediately operational to get back into the schematic action of the game.
I understand the frustration, however, I simply find the environment I want to play cartoon fighter, bomber, tanker, etc... and do that. When I am with my squaddies, I am usually enjoying the company while doing something I love to do. But I would be against making hangers indestructible as it would promote bigger hordes to take a base IMHO.
I am not telling anyone how to play. Just giving my opinion on the subject. No disrespect intended.