So by indie you appear to mean relying exclusively on sideloading for deployment as opposed to a download store with multiple developers' software, even the one run by the hardware manufacturer. Then let me restate my previous comment to confirm to your definition:
Sometimes you have to become not indie just to get a game published. I'm told that only a commercially insignificant number of people have machines that 1. are connected to a monitor big enough for couch multiplayer and 2. can run sideloaded software. Retail consoles can't do the latter, and I've read that gaming HTPCs are virtually nonexistent.
they didn't sue him for programming without a license but for DMCA and copyright violations.
That's true in the same technical sense that Denys Vlasenko sues violators of the BusyBox license not for "GPL violation" but instead for copyright infringement. If the only way to program without a license is to violate Title 17, then in practice that's the same thing as banning "programming without a license".
Sony had a simple rule "If you follow these rules you can play in our sandbox"
One of the rules at the time was not to use hardware that was still being produced. The fat PS3 had been discontinued in favor of a new model without Other OS support. Assuming hypothetically that George Hotz had not exposed PS3 flaws to give Sony cause to disable Other OS in 3.21, where would one find a replacement for a fat PS3 console whose hardware had failed?
You can run your own apps on your own devices easily
Only with the $99 certificate, and only if it hasn't expired. Otherwise, you're stuck with the simulator.
global variables by default unless you use var every single time
Fail! That's not entirely true for reasons that are obvious if you understand the language. Nice repeated meme though.
Or just use a bigint library, like users of other languages have done for years.
Is there one bigint library on which programmers have standardized, or will three different libraries that I include each bring in their own separate bigint library dependency?
Try learning the language first.
Once I do start to learn the language, how should I go about determining whether the extent to which I have learned the language is enough to allow me not to make a fool of myself here on Slashdot?
Heck we don't even have the equivalent of AMA that can sue people for programming without a license
Yes we do, as seen in Sony v. Hotz.
Experience and training is not very important as long as you know how to write good code that's efficient and makes sense to others.
Except hiring managers trend to use the former as a proxy for the latter. They want to call previous employers to verify that a candidate's code works and makes sense.