If they stop being Nintendo, nobody will care about their mobile games anymore. There'd be no front-page MR news for Dr Mario. Unless they do the freemium thing better than Clash of Clans does, which I doubt.Nintendo essentially lost one segment of their business by releasing the Switch. They now have a unified home/portable platform. 3DS is on its way out. They’ve got to make up for that loss somehow. Nintendos new president said he intends on making mobile their next big business segment.
Their mobile efforts are entirely about making money. Because thats what a publicly traded company is demanded to do. They tried, and publicly stated their preference to a one-time purchase over micro-transactions, however it didn’t work. Micro-transactions won. Their console business is where I would expect them to continue being Nintendo.