I think you're right about where the discrepancy lies. Pesce is definitely a piece we covet, but Boeser I think gets a lot of flack despite being great in all aspects of the game. If Carolina could afford trading Pesce for a winger, they could do worse. Value is tilted a little towards Pesce IMO, but it's not an insulting difference in value.
Demko for the 13th overall pick would be a huge win for Vancouver. It could be a win for Carolina, but it's a gamble. I want to think that Demko will continue his upward trajectory, but there is nothing close to assurance of that. If Demko had more games under his belt, playing at the level he has, then the value would be even out a little bit. However, given the 42 games in the NHL, this is where the deal falls apart for me, looking at it from a Hurricanes perspective. As a result, a slight difference loss in value from the big pieces, and a big difference in the little pieces, means that Carolina is missing some motivation to make a trade like this (not factoring team need either, I honestly have no idea about the Hurricanes' winger situation).