You'll hardly ever find a well known bassist putting down another bassist for using a pick. It's almost always third-rate wannabees.
I think that some bassists initially gravitate towards using a pick as it is easier. There is no way you can find fault with Bobby Vega's technique when he's using a pick, but pick playing on a bass is a skill that still has to be mastered. You get more instant results bashing away with a pick, as a beginner bassist, over trying to get consistently speaking notes from fingerstyle playing.
I started playing pick, but I drank the Talkbass Koolaid and though I
had to use fingers. Initially I was making more noise than note playing with my fingers. I think in general you can't fake fingerstyle as you can pick playing. Whenever I've gone out to see local bands the worst bassists have consistently use picks. They are either beginners or moonlighting guitarists, and in either case they don't know how to get a consistent tone that actually does the job of underpinning the music. I've never seen somebody seriously fumble the job of bassist who was also a fingerstyle player.
Saying all that, I suck as using pick on a bass. My tonal reference is that clicky, palm muted '60s soundtrack pick tone. I don't get a good sound unless I use a compressor. I'm left handed but play right handed, and my thumbs are double jointed! I can pick fine on a guitar, but I don't have the picking stamina to get good results on bass.