I really don't get the point behind declining 2:1 or 3:1 trades for unknown artists

Like, if you have 1 apple and I give you 2 apples you'd take the 2 apples right? So like...what's the difference here? You and I both aren't collecting the artists being exchanged so they're equally as worthless to both of us. You aren't losing anything either, you're gaining an additional song. Just weird to me. I can excuse not accepting 1:1s, there's some logic behind that (although I do accept them), but declining 2:1 is some petty shit imo.