However, none of those points address the people that have wasted(?) the Wii U's life waiting for games and now want something new.
None of my points were supposed to. They were meant to explain how important it is for Nintendo to have enough content to attract people who dismissed Wii U and would be inclined to dismiss Switch if it's life starts similarly the way its predecessor did (e.g. immediate software drought).
Nintendo hasn't stopped making new games. You may be underestimating three things:
1. Ports don't require nearly the same development resources as a new games therefore those teams are either split or the port was handed off to a different team (e.g. Tantalus)
2. 3DS develop is also winding down. Despite what Nintendo keeps telling people, 3DS is likely getting phased out within a year.
3. Once that happens, Nintendo will be developing primarily for one platform with mobile taking up far fewer resources.
That said, if you want new games, you'll get plenty of them eventually. In the first year or so, you're just going to get a lot of last generation ports, but when was the last time that hasn't been true?
Why buy one at launch when the system will arguably sell for the exact same price down the line with a much better and likely "Select-ified" library two or three years down the line? Why buy it at launch when I already own the games they're releasing for it...
Exactly. You don't have to buy one at launch, and no one is making you. You don't have to begrudgingly do anything. Just don't buy one right away. If you do buy one at launch, that's on you which isn't an indictment. For the betterment of its new platform, Nintendo needs more than the people who are already planning on buying it.
And of course if the Wii U library was such a system seller then the Switch wouldn't exist and we would be talking about upcoming Wii U releases.
You'd have to change a lot of things about Wii U to reasonably make that point.
But I also have the Iansane fear tendrils about how a port-laden Switch launch period could encourage a certain narrative among the gaming press/commentariat that could smother the system in the crib.
Releasing a bunch of ports and padding the lineup is exactly what Sony and Microsoft did so if people give Nintendo **** over that, Nintendo is damned no matter what it does.