Hmmmm you should probably say "IMO" after that statement! I have played at least a thousand gigs without pedals, but lately I have needed a couple of filters for the production shows I've been playing to cop some of the keyboard sounds. If its a choice between working and not working, I'll take the pedals
He should also say "IME" (in my experience).
Some of the gigs that may interest some bassists the most may require something other than bass and amp. Lugging a keyboard around, or hiring a keyboardist, might not be feasible. Also, copping certain bass-amp sounds ain't easy if you don't have that particular bass and amp. Fingers alone can't make every tone. If a pedal or two (or more) will get the job done, why not?
Effects even help me fine-tune my
synth bass tones (some of them are sampled bass guitar tones) in ways that the onboard parameters simply can't do. Also, some of my synth modules are non-programmable, so effects have made many of the patches much more usable. I could buy a dozen synths and not get the bass sounds I get from simply running my keyboard through pedals. Extremely versatile and relatively inexpensive. I wish I'd thought of using pedals on my synths years ago (especially when Mu-Tron IIIs and other classic effects were much cheaper!).
As far as necessity - that's between the player and his or her band mates, or whatever studio has hired the player. If you do home studio recording like me, then it's completely your choice. I got along just fine for about 20 years without effects. Now I use them extensively, but not all the time.
Bootsy tore it up with James Brown, but P-Funk was a different vibe. Did he
need effects with P-Funk? Did P-Funk
need to use synths, especially synth bass, as extensively as they did? No and no, but considering the incredibly unique and iconic sounds they were able to generate (how many bassists and keyboardists have tried to emulate "Flash Light," "Aqua Boogie," "Knee Deep," etc., and how many bassists have added envelope filters and other effects to their rigs because of Bootsy?), I'm sure glad they did!
EDIT: The OP probably doesn't need them, but there have been some posts that suggest that effects are never needed on bass. I disagree.