Well I'd be more willing to take the risk if it looks to be a done deal in convincing the general populace that it really IS a good and safe thing to seal yourself up in a tin (okay, aluminum) can of a tube, and breathe the same air and share the same environment with like souls for an hour or maybe fourteen. Fear and paranoia are powerful things in the realm of business and selling; great for the gun industry, hydroxychloroquine sulfate makers, canned food producers, and the toilet paper and hand sanitizer manufacturers, but not so much where folks are going to be tightly packed and squished together, whether it's a 787, cruise ship, concert hall or a football stadium. And with any sort of vaccine (let alone a cure) many months if not years out, that's more than enough time for an airline to eat through that bailout money and start their collective CFOs and bankruptcy lawyers crying "Chapter (pick your number, any number)".
Airlines, airplane makers, vacation destinations, hotels, etc., etc., are going to have to do a lot of hand-holding, slick and smooth talking before those industries get a whole lot bedda. In my mind airline stocks are definitely a looong term investment, and a high risk/questionable reward strategy at best.