But you said "lunch bundle"...
But if you insist on a serious answer, your proposal is unreasonable because a Switch without Joy-Cons isn't a Switch out of the box anymore. That causes headaches for marketing the system.
I did? typo lol.
Maybe it's not, but it allows Nintendo to go after a different market of gamers who would be more interested in Zelda, then in any of their other franchises.
Their are a lot of gamers who play action rpgs such as Skyrim/Witcher 3, who don't care about the Switche's party and motion capabilities, and such a bundeal would appeal to them.