Imo, everybody is allowed not to learn anything about any other system. However, if you want to be a GOOD player, you'll try to learn at least the basics of your opponent's system! I haven't seen many REAL world class players who don't know which defense they'll use against a certain system. They know what their opps are playing, they know what the tactics are, and the play accordingly. If you don't know how WJ2000 works, just read the intro and you'll know enough. You'll know the openings, which is usually enough, but also the reason why they open in a certain way. And perhaps you'll even find it a better system than you currently play and learn it completely. If you don't know anything about any other system, just play a horse...
If you don't know what bids mean, you can always ask opps about them. This doesn't mean you have to complain (and keep complaining all over the place) when something happens which in your opinion is wrong, but in the entire community's opinion NOT wrong!
You 'bid' based on YOUR assumption that they play sayc, but WHY would they play sayc anyway?
You had your answers (on several forums btw), if you still hope to find someone to stand by your side you'll need a VERY long time...

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