To be somewhat fair to Nintendo, the Switch had more doubts than optimism going for it from when it was revealed in October up to its launch, and after what happened with the Wii U (and to a lesser extent, the 3DS), I'd be very cautious about how many of my newest system I ship out as well.
But now that is obvious as the sun rising in the morning that the Switch will be a huge success, their inability to meet demand up to this point is bewildering. I'd HOPE that they have a lot of stock for the Switch for next month, given how they've got one of their biggest IPs, ESPECIALLY in Japan launching, and that IP has proven to be a bonafide system seller (The Wii U outsold the PS4 in Japan during June 2015 thanks to Splatoon 1, and that year was the system's highest selling year in that region), otherwise they are REALLY incompetent when it comes to stocking their system.