Well 3 band EQs aren’t objectively better than 2 band EQs so yes, it’s exactly like saying that.
That is indeed the theory, however if your string muting technique is up to scratch then this benefit is somewhat reduced, don’t you think?
It’s a choice Yamaha have made and they no doubt have their reasons for doing so. However if you look at a cross section of high end bass brands (Sandberg, Lākland USA, Fodera, ACG, Musicman, Warwick, Overwater, MTD USA, Wal, Sadowsky, Mayones, Xotic, Alpher - the list goes on) you’ll see that they overwhelmingly favour non-individual bridges. The combined years of luthiery experience across just the manufacturers mentioned above should in itself say something. And I highly doubt that they’re a load of old farts unwilling to move on with the times.
If anything, I’d say the greatest benefit of individual string bridges is that they give the luthier the ability to easily design and build a wide variety of basses without having to order a load of different parts. When you look at the kind of high volume production Ibanez has, coupled with their desire to regularly release innovative new variations of existing bass models, being able to use one bridge type across wildly different instruments makes complete sense. Look at the Ibanez website - 4 strings, 7 strings, 16mm string spacing, 19mm string spacing, fixed scale, multi scale, SRs, BTBs and even their new Electric Upright Bass - all sharing the same “Mono Rail V” bridge. Coincidence?