I am much more worried about a "false positive" [...] than I am about "false negatives" in which compatible people can't get past their communication shortcomings to see that they are actually made for each other. I just think that there are too many good options for most people.

Funny, I think there are very few options and thus I'm willing to tolerate a lot of initial bumpiness in communications to see whether we're ultimately compatible. To each his own. (I had a lot of communication problems early in life, and still do to a lesser extent, and that may be part of it too.)