Just a hunch but ... as concerned as men are with their "goods" if disastrous outcomes were super common it seems like you'd hear more about it, you know?
Granted, with any surgery, there can be complications - but most cases seem like they go just fine and if you hear otherwise, it could be a fluke, or there could be psychosomatic problems behind the complications.
With women, you will hear of "tubal ligation syndrome" being such a huge problem - you will read scary things about it. In some cases - there are probably sometimes genuinely serious surgical complications.
But in a number of cases, it's just truly amazing how reversing the tubal and having another baby makes the woman feel SO MUCH BETTER. Kind of makes me wonder if she wanted a medically justifiable reason to reverse the tubal, you know?
Any time you read of a negative outcome - consider the source and any ulterior motives. I'm not saying there are *never* medical complications - surely sometimes there are - or that reversals are always motivated at their core by a desire for another baby. But be open to other interpretations.
The quiverful links are *very* questionable IMO...
Good luck to your husband.