What they're trying to say is: "I want to support this game, but the gacha system is awful and designed to wring you dry if you want anything specific, especially in SG scratches where you can't even trade for the items you'd like"
But yeah, this is just an incredibly predatory system that needs to disappear from games altogether. Everyone in this thread should look up how gambling in general is designed to prey upon how the human mind reacts to games like these, it'll leave a bad taste in your mouth when you see how much research is put into making them as addictive as possible (not necessarily PSO2, but at the same time it'll give insight into how and why they do things this way).
It really is something that shouldn't be defended on any level.