Delta is the only big American airline, that I know of, that doesn't own any Boeing 737 Max aircraft. I don't know when these planes will go into the air again

Delta is the only big American airline, that I know of, that doesn't own any Boeing 737 Max aircraft. I don't know when these planes will go into the air again but I assume they will. Based on the reporting of the problem with Boeing and these planes I don't feel like I want to fly in that plane and I don't want to play ticket games to try and avoid a particular type of plane. I know lots of people have good reasons for being angry at Delta, but for me just the fact that they don't have this particular plane and thus I'd never have to worry about ending up on one of them makes me likely to continue using Delta. Is this irrational of me?