Hmm.
Look, I kinda want to go through the entire thread here, but honestly, it'd take too long... so I'm just going to hit the major points... starting with what I feel is the biggest issue present.
You really don't seem to get what martial arts are.
I'll elaborate...
There is no one thing called "martial arts". There is no one skill set that is central, or universal to all martial arts. In fact, your attempt to focus on techniques is really, when all's said and done, not really anything to do with actually learning a martial art. The reality is that techniques are really nothing more than the particular expression of what a martial art really is... which leads us directly to what exactly a martial art is.
A martial art is a particular approach to certain combative questions and contexts. As such, you can't learn "martial arts"... you learn a particular martial art. And, of course, that means that you can't learn a specific methodology by making stuff up and randomly hitting a BOB. It's like saying that you're intending to see how you go self-teaching yourself a language by sitting in a room making sounds, with no thought to grammar, syntax, etymology, spelling, writing, or anything else related.
You've mentioned a few things... principles, tactics, strategies... but haven't really given any mention to anything specific. Different arts have different principles, often contradictory with other systems... same goes with tactics. So how can you know what principles or tactics you should be addressing or employing in your attempt to learn "martial arts"? I mean... the tactic of "control the fight to the ground, and employ submissions to gain success" is not exactly compatible with the tactic of "remain standing and attack from a distance before escaping". Both are quite valid, but neither really suits the other... and both lead to very different martial arts.
However, to address your reasoning, namely that you feel that this endeavour is not too dissimilar to other pursuits you've attempted, and that you're somehow better positioned to have success, despite you're complete lack of understanding of what you're even attempting, then let me just say this: You're not special. You're not different. You're attributes, no matter what you may believe, aren't that unique, or even applicable to this. It really doesn't matter how "disciplined" you feel you are... as, frankly, that has nothing to do with anything here. The ability to teach yourself chess is honestly similarly meaningless, and the idea of you being a writer is quite besides the point (and, I might say, has simply added to your perception of yourself as being special in some way... judging purely on your posts here, I'd be hesitant to blow that particular horn).
You asked for a reason that you can't do it... well, honestly, the main reason is that you don't seem to understand what you're attempting to do. It's like you're asking about teaching yourself maths... then ignoring any questions about whether you're wanting to learn algebra, trigonometry, geometry, calculus, or what... saying that you don't even want anyone to teach you how to write numbers, as you can figure them out by yourself.
Oh, and I'd recommend against such passive aggressive tones... they can easily be interpreted as trolling... which is a quick path out the door... friendly heads up there.