If you want to get biological, Spiderpig sir, then why is making friendships about 100x easier than relationships?
It's certainly hard to make friends, but not as hard as relationships.
But making friends should also be just as, if not more difficult, right?
In ancient times our survival depended on who we associated ourselves with - our friends were part of our tribe, and were key to survival as teamwork was almost necessary to survive and hunt.
So why are we so much less strict about and have lower standards for who we befriend and why can we have a more diverse range of friends but a very strict criteria for what a relationship partner should be?
Yes, we should choose carefully when picking someone to procreate with, but shouldn't we choose even more carefully for people to help us with 'the daily hunt'?
So why is it possible for us to have about 5 or more friends but only have ever had 1 or 2 relationships?
If out standards for choosing friends was just as strict as relationships, most of us would have only had about 1-3 friends in our entire lives so far, possibly even none.
I'm sure 90% of people here and everywhere had to lower their standards to make friends, but would NOT DARE lower their high standards even slightly for a relationship.