Yes, Please do so.

In all reality every game developer should strive to put their product on every possible platform. Tools make it easier than ever and remove a lot of the risk involved.

To be clear, every possible platform does allow skipping dead/dying platforms.

If I were any dev, I would plan for:
1. PS4 family
2. Xbox family
3. Switch
4. PC

I think it would be cool if they didn't, but I don't think it should be a requirement. They should do what seems best for them.

Right now is actually a great time for any and all indie games to be ported over due to both the Switch feel being ideal for smaller, yet still rich and creative, experiences and due to a decent lack in established titles. The system is easy to port to as evidenced from comments from developers who have already ported their titles. Later though as the market becomes more saturated, it may be easier for a phenomenal, smaller budget title to be overlooked.

Getting new legs on existing indie titles through porting or reinventing is brilliant for developers; creating a ground up experience that you are not sure will be a success at the time of launch is still going to be a gamble. If 3rd parties continue to skip the Switch with their biggest titles, however unlikely but possible, then this becomes a mute point and Switch will become the indie/Nintendo console that "is just so hot right now."

Every game that can run reasonably well on the Switch should be on the Switch.

Period.

It's a successful selling system, there's no reason for games to skip it.

Freaking straight ROM dumps of 20-year-old Neo Geo games are selling well on this system, there's money to be made here. 

Just scroll through 200 Angry Birds clones, 150 Flappy Birds clones and 300 Candy Crush clones and MAYBE youll find a game that looks kinda good!

Yeah, I can't exactly picture the former heads of Argonaut opening an indie studio and ever working with Nintendo ever again.

Surely in terms of the platform easiest to bring games on would be that which they are initially programmed on and where the absolute most tools for distribution are available? Also in terms of install base while the figure is flawed it's hard to contest how many PC's are out there :)

Nintendo won't advertise your game on their social media if you don't release at the same time as other consoles so some are quite resentful of that fact.

Of course. Not saying they should only release on the Switch.