I don't think it's bad that Nintendo has control of those markets and I don't see how what you're saying is trolling. I just hate the mentality that this market is everything that ails gaming and will change it to something the 13-25 year old demographic don't want it to be. There will be the titles you want to see, just speak with your money. The day the 13-25 year old demographic stop buying games will the day MS, Sony, and their third party partners shift accordingly.
It's not, but every time I even mention children and Nintendo in the same sentence on this site I usually get called out for it.
You're right - it's no bad thing at all, Nintendo provide something different to different people and at the minute they are business gold dust.