Unfortunately just because you're not the one flying, doesn't mean it doesn't impact your wallet. For several years I was flying monthly if not weekly providing a service to businesses helping them reduce their operating costs. Without the airlines, there would either need to be more of me, or fewer of them (and since my company loves those profits, it was much more profitable for them to pay for an airline ticket for me)
You probably spend money with many of those company or their customers on a monthly basis so yes, if the airlines go broke, or reduce their availability (and the one remaining will be able to increase their rates) it will impact your life.