The French call both "couteau d'office," and the only thing that varies between them is length…
For in hand work (coring, pitting, peeling), I have several requirements in a paring knife: a feather light handle, a short blade (less than 3.5”), pointy tip, and very thin edge. I personally use a vintage 3" Sabatier Nogent and 3.25" Robert Herder – neither sees contact with a board.
A longer “couteau d'office” (say 4-6") is a very useful knife. Also known as ‘utility’ and ‘petty’ knives, I use mine for deboning birds, trimming raw proteins, portioning cured meats, small board work, cutting sandwiches, etc. I find around 6" or 150mm the perfect length.
HOWEVER, if my chef's knife is already on the board, I never use my petty. If I am preparing a larger meal, it's always a chef's/paring knife combo. I hate having more than two knives on the board at the same time. More often than not, it's only my chef's knife on the board.
For you, if you find immense utility in a paring knife then that's great. I wouldn't be without mine. With that said, my petty pretty much functions as a smaller chef’s knife in those instances where pulling out a 10" chef's knife is overkill. Therefore, in actual board time it sees far more use compared to my shorter paring knives.
Like I was saying , this is so me, even with Sabatier in mind, the knife on the board and cleaning the knives after.
I guess most people that get proficient enough this way, won't reach for anything else if it's not a really specific task.