Wise duelists only spend money on structure deck, because they will get exactly what they pay for. Box is all about randomness, spending money on it is such a waste
Wise duelists also know, Selection Boxes are the only box where it is absolutely worth it to spend your money on, since it's basically many of the good cards from multiple boxes, combined into one box.
This way, you don't need to spend the gems/money and the time on multiple other boxes.
Did you forget that Selection Box Vol 1 screw up many players? People spent hundreds of dollars to get 3 Dark World Dealings, only to be disappointed when Valiant Soul box came several months later
DWD case will happen again on Necrovalley. Unless you are a youtuber or content creators or you have unlimited money, Selection box is really not worth of money