I haven't found much use for knowing my intertype relations with others.
I am an INTj. If my friend is an ENTj, socionics only explains the pros and cons of the relationship. Socionics only helps me to understand the relationship - and that's it.

There is no benefit in this.

If Socionics told me how to improve relations with an ENTj (for example) then perhaps I can say there is a value to knowing intertype relations. But Socionics does not do this.

Or is socionics hinting that I need to ditch friends (and family) that are not in the Alpha quadrable?