Not to sound rude, but if all you're doing is straight ahead walking heavy gigs then by all means you may never need to use a bow. If you want to be working a lot, then you're gonna need to be at least decent with the bow. If you get a call for a musical gig where the bow is used and that gig may help you a pay a lot of your bills for that month, you better have your bow chops together. Or you start working with a singer songwriter and they're wondering how to expand the sonic pallet of a song or two. You can whip out the bow and just play some simple long tones. What if a traditional music band asks you join and a couple of songs require a lot of arco? The possibilities are endless. I will also add that I've noticed a lot of the heavy weight jazz players in LA (both old and young) are also highly adept with the bow and even spend some time working in the studios.
For me personally, like @Ed Fuqua mentioned, using the bow has greatly improved my sound and helped me better understand pizza technique. When I started seriously studying the bow in college, my classical teacher told me in my first lesson that arco and pizz are much more similar than I was thinking of them to be. The principal is the same. You're just pulling the string with arm weight and getting the bass to produce a nice full sound. Now I can get a much bigger and fuller sound pizz without over exerting myself. I also feel that when I started to practice heavily with the bow, my bass opened up and sounds much better than it did when I was mainly practicing pizzicato.