Almost all of those you're forced to use because there's no/little competition that runs on the hardware, or it's an alternative compiler for a popular language (piggybacking on what OP described)
On top of that, you are only going to use those when you have to release on their platform using their tools and their publishing systems. You can just as easily run your own code, compiled by your own compiler. That said, some of those would be in a bit of a grey area considering that you would have to hack/jailbreak all of those consoles and handhelds etc.