Yes, I absolutely agree that in principle the pups angles should follow the string radius but I haven’t managed yet to get even volume response on any P bass I’ve owned, ever, mainly because there’s always at least one string closer to a pole piece which changes volume and clarity. There’s always one string louder than the others, so equal string height to pole or plastic goes out the window affecting the aesthetic of angles.
I had one with threaded saddles which allowed more precise spacing allowing each string to be as near as dammit between each pair of poles and that one recorded really well.
We all know Jazz pups being flat are a compromise and it’s an art to play softer on the E and G unless you want to go through a compressor. Good old Leo even recognised this with Strats and staggered the poles so that everything sounded nice. There’s a lot more to it than just plugging in and making a noise.