Interesting post. But you should not prematurely speak of Bird's opening as if was refuted. Even world #2 super-GM Nakamura used it recently (in a speed game, but this still says somehthing). I admit that top GMs usually avoid it, and many strong players would say that "white struggles to equalize", but the fact that it is uncommon gives it some surprise value. At sub-expert levels, many players know that it's supposed to be "bad for white", but don't understand why, or how to punish it.
Incidentally, From's Gambit is not as strong as you apparently think it is. Black would probably do better by responding 1...d5 and going for a reversed Leningrad position. If you think From's is black's best try, then I would be willing to play the white side against you.
A Dan Heisman article has mentioned that a beginner should learn French defense to learn the freeing moves from cramped position. In a tongue and cheek fashion, I reckon that a beginner should also learn bird's opening for the following reasons:
1. If you play a good opponent, he will show you how to exploit the weakened f2-h4 diagonal as well as the weakened f2-a6 diagonal. You learn various way to lose a game which you didn't know existed before. I am not simply talking about a queen check followed by N or B takes on g3. There are very many other ways to lose a game. If you master those ways, you can use for yourself in the future.
2. You learn at least two ways to lose a game in four moves. I fell victims to them.
3. You get to learn the value of king safety as you have to guard against checks from different sides including checks from the dark square diagonals as well as potentially knight checks from f4 square after your king moves to h1. Also whether to move your king to h1 is a dilemma.
4. I think it was Roman Dzindzichashvili who said Bird's opening is for lazy players who want a big attack without wanting to study theories. I laughed when I heard that because that is pretty right on. I am lazy and don't want to study theory. On top of that, I also play dutch defense so that's two birds in one stone. This frees up some time to learn other things like middle game or to play witcher 3.
5. Your opponent will show you how to deal with fianchettoed bishop by locking pawns at a particular color and rendering the bishop's activities to nil. I have played so many games during which both of my bishops were useless and it was like I was playing two pieces down.
6. Your opponent will teach you how to beat bird's opening with From's gambit.