Sorry if I come off preachy, but wow, your post really boggles my mind. Especially if you represent a demographic of people learning Socionics.
"Not practical"? Are you bride shopping online or something? In my personal view for my life, love and relationships come organically even when I'm looking. There's no active weeding people out and devoting all my attention in finding "the one." I think most people are like this, but I could be wrong. And how do you know who's SiTe? Sorry, again, this is harsh, but learn Socionics! If you learn the hypothesis and try applying it to offline relations, you'll soon find that you can type the people around you, and eventually, the world! If you want to devote that much time, that is
But really, look around, learn, and ask questions... There are many topics of people typing and recognizing types offline, and if you get to know the workings well enough, you can start doing it too.
The rest of your post... Well, to each their own