SJM Mating bond logic in bonkers

So, is the mating bond supposed to be about true love? Because if it is, why do some couples not work out?

Tamlin and Rhysand both mention their parents weren’t exactly happy despite being mated. And if it’s about creating strong offspring, then why on earth (or in Prythian) would the Cauldron/Fate/Mother—or whoever is in charge—pair Nesta and Cassian when there’s a high chance she could die giving birth?

Actually, scratch that. Even if it’s about love, why pair them if she’s just going to die in the process?

I have infinitesimal questions for SJM at this point.

Btw if I were Azriel, I’d steer clear of any High Fae after the nightmare that was Feyre’s pregnancy. Nesta’s probably about to open a uterine modification clinic at this rate.

Thoughts?