I understand your points of view.
I alternate with both fingers with ou any kind of problems. But there are some tunes, or some styles, or some basses, that sound better with only one finger.
Jamerson did it, for example.
When playing bossa nova, or samba with very light plucking, with just an acoustic guitar and an acoustic or semi-hollow bass, you notice.
Playing rock, with a full band, it is not noticeable.
It's the down stroke /up stroke, with a pick. It's noticeable.
I will agree it may give you a different feel. But my point was if it gives you a different volume consistency compared to alternating fingers (which is what I thought we were talking about) you need to practice alternating finger technique more.
As far as Jamerson goes, he had his own style. While I find his approach interesting, I don’t extrapolate anything from it other than it worked for him. I don’t think it’s a good approach for most players as evidenced by how few bass guitarists play that way despite the details of Jamerson’s technique being common knowledge.
My feeling is try it. And sure, if it works for you, go for it. But I also think it’s a very limiting playing style for a lot of other styles and genres of music. Jamerson had his niche, his brilliant musical inventiveness, and a unique playing style that worked well with it. How well his technique, if taken in isolation, would work with what anybody else is doing or playing is something each individual player would need to determine for his or her self.