Comparing Switch 2 to Nintendo's "Wii-era" of thinking is a bit ridiculous.
The Wii was a 480p home console that was merely a bump-up from its predecessor's hardware with no real changes to the actual graphics architecture. The Switch 2 is a mobile device that features DLSS, a 120hz VRR screen and is a substantial jump over its predecessor. Even if Switch 2 was limited to its handheld capabilities only, it still handily outclasses the Wii in power for their respective generations, let alone what it can achieve in docked mode.
Anyone can argue that tech could've been even better but the Switch 2 demonstrates considerably more modern thinking with its hardware for 2025 than the Wii did in 2006.