I don't necessarily mean take 1 game and make sure it's developed for all systems semi-equally, per se (otherwise we'd end up with Jurassic: The Humped), but rather putting your good foot forward to provide those products that do similar jobs despite targetting different platforms. Street Fighter went HD, while TatsuCap went Wii -- different projects with different targets yet doing similar jobs without the Wii version being some ugly duckling that remains ugly -- all well and good.
"Why would that make sense?"
Because it provides a clean frame of reference for a company to speak from before they blame Nintendo/Wii/casuals on disappointing sales. "Did you apply your best efforts, like you're so happy to do on other platforms?" Yes?--OK you can blame the casuals. No?--OK 3rd party, you're full of ****.
Let's stop talking about RE5. That's not a game I want to see on Wii. Legend of Barry or some other original RE4Wii-based adventure that would've gotten Mikami's blessing, yes.
RE5 "not on Wii", if anything, just highlights the gap left by a potential full-fledged Wii Resident Evil title. Wii got Monster Hunter Tri, a huge huge game everyone has forgotten, so it shows Capcom had significant resouces go SOMEWHERE substantial, but it doesn't address the gap for a dedicated Wii RE title.