It's not just a price cut though, if you wanted a slimline just portable from Nintendo this is it, I know of a few people who had issues with the Switches TV features and removable joycons instead of it being a solid handheld unit (I even offered to weld/Glue joycons onto a Switch for a mate...)
I definitely could see the Lite getting other people to buy the Switch who might love the games but not the system with the dock and such so I would imagine the weekly could go up by 10k on average if the lite didn't drop, that is after the initial launch week which I see as being a 1m week easily.
Yes,it isn’t just a price it, but if you want a switch for $100 cheaper, you have this option. 10k is not a lot. The Japanese baseline will be raised more than that alone