Speaking for myself, it's because although I feel pretty qualified, when it comes to all these job openings at various legacy carriers, I also feel like I'm in the lottery.

I'd like to work at Delta, but so would tens of thousands of other pilots, and I'd bet that half that number are at least as qualified on paper as I am. Would United be a bad place to go? American/US? SWA? FedEx? Of course not, so even though I want Delta, my app is in at the other places because who the hell knows if Delta will ever call me.

Besides, it's all mental masturbation until (if!) I get called to interview. I'll make the actual go/no go decision then.