No. There's a history of people making this idiotic claim, though, despite it going against even a child's understanding of economics. You don't artificially create a shortage of something you ALREADY think will sell really well- you'd make MORE of it. The *only* way it'd make sense to make an artificial shortage is if you price gouge, especially on future production waves. But that doesn't happen. Not to mention, video games are very heavily reliant on pre-sales/Day 1 sales. Sales tend to have large falloffs right after, which is why you see AAA games go on 30-50% sales just months after release. So the idea would be to flood the availability out of the gate, and then taper back from there (which is what actually happens).
The idea of forced scarcity makes even LESS sense than the already no sense that it does when you consider all games are digital now. The time and effort spent looking around town for a physical copy could be achieved with a $20 micro SD card purchase, if you don't have the space.
No other Switch games have been hard to find. It just so happens it dropped right as large-scale stay-at-home orders were going into place, and it's a fantastic time sink for those stuck at home. COVID is spurring the sales of an already popular game.
The Wii's initial release proves your post wrong. ---