Def Lappard is coming to Japan

Def Leppard seems to come to Japan near future. I've loved their music for around ten years. Even the local radio show plays their tune lately. Great.
But I won't go to their concert, because it's planed to be performed with Whitesnake. Of course I'm not disliking Whitesnake. I'm just disappointed. I can hardly imagine the purpose of the concert but for earning money.