There's a difference between helpful (yes, undoubtedly, esp instrument rating) and worth it (not the cost of getting private/instrument/commercial/multi)... just to get hired in an entry-level op where they'll happily hire you if you dont have those ratings. Majors will hire you based on experience at a regional and knowledge. If someone's paying for ratings for you or you really want the ratings as a personal goal, I'd say absolutely. I am instrument/commercial/multi. I felt like having taken few FAA tests made prepping for the ADX a bit easier and the actual dispatch course a LOT easier, reading approach plates wasn't foreign, and METARS and TAFs were a breeze. You can learn those without flying though. If you want to go a cheaper route and still have a little leg up on the others in the resume pile, be an instrument ground instructor! You do not have to be a pilot to become a ground instructor.