How so? How would practicing magic and poetry be linked? Ulgu may lend itself to mystics and showmen, but Elves try not to become so inclined to wWinds (and Boney has implied they can't IIRC). And learning magic seems like it would just take away from your time practicing your craft.
There are elven mages that specialise. In fact, most of them do. They don't in the way of humans, who can't do something else, but being more comfortable or in-tune with a wind does not require changes to the soul, that is a matter of personality and simple experience. Also, the thinking patterns best suited to and encouraged by a wind would still affect them over extended periods. Just like Mathilde would be affected by using dhar even with the belt, because it requires thinking like a megalomaniac.
And I think elves would consider learning magic as part of practicing your craft. A woodworker would know some Gyran to shape and strengthen wood, maybe some Aqshy to cure it, maybe Chamon to analyse it. A metalworker would probably know some Chamon and Aqshy. And spells like the toolless enchanting set are probably very common and widespread.
As for why poetry and Ulgu? On the one hand, if your a professional poet, you probably have to do some recitation if you want to get your name out there, so you have to be something of a performer. Thinking about clever hidden meanings is also an Ulgu thing (though depending on your approach, it could also be quite Hysh if your seeking to convey/discover a deeper, simpler truth). So the poets will be more Ulgu inclined than the "average". And on the flip side, Ulgu is just plain useful. Illusions just for the showmanship, and mental magics to enhance a performance (where you'd also have aqshy for passion).
It's obviously speculation. It's not baseless, but it's also not well-founded. It's plausible enough that thinking about it is a decent enough way to spend some time. I don't think it'll come up in quest, because Mathilde got invited by the elf ninjas, to elf ninja land and nowhere else, and she
is secret police so ninja magic is a lot more useful to her than poetry magic.
Hmm... you know, considering how well they fit the Ulgu ideal, maybe elves actually
only have Ulgu-using mages, and they just use it to fool people into thinking that they have other traditions. Maybe High Magic is just one big practical joke nobody's figured out yet!
Deathfang is an Ulgu dragon, but he's not going to admit to it.