Almost nobody. But the benefits don't have to be some sort of personal gain: I'm sure most relationships are just for the "benefit" of someone who supports you emotionally rather than with money/fame/power.
If anyone wants a great starting point to help out I would recommend the talks by: https://youtu.be/lMBqFFnSS5U?list=PLe7tfp6fIaMwdMTW2O3-kkBiJ...
For Veting individual you can simply use `Transactional analysis` to quickly filter from people who're high value vs high drama.