The issue with the $450 price is that it gets them too close to XS/PS5 pricing, and closer to whatever SX2/PS6 pricing will be.
$300 Switch compared to $400 disc-less/$500 standard PS5 really helped it sell well. Being $50 more expensive than a PS5 disc-less and only $50 cheaper than a standard PS5 doesn't seem like good business sense, considering the Switch 2 won't be close to them in performance.
I think at the absolute most they go $400 on Switch 2, but maybe as low as $350. Based on the success of Switch 1, they no doubt got really good deals on parts for Switch 2 from manufacturers, so I don't think it will be as expensive to build as some here think.