The Profit lives downmarket. Just a guess.
To the OP: I blame my 617 for most of my trigger-pull improvement over the last year. It doesn't feel like my carry trigger, and if I could only shoot and dry-fire with one gun, it would be my carry gun. But doing a lot of intensely-focused dry-fire with the 617 taught my finger-muscles a lot about "trigger mechanics," as TLG once phrased it. These days, I don't dry-fire with it that much, just once in a while to make sure I haven't slipped. I mostly shoot it live now, trying to get the same level of accuracy with DA as with SA. Again, it's not so much that DA/SA is what I shoot "for real" - it's that getting good with DA and SA builds a strong base for any kind of trigger manipulation.
Also, it may be that working with a 617 is mostly valuable for folks at my skill level. (Hint: my skill level is where The Profit lives... )