Random Fandom Stuffs

Not Really a Fandom Thing just a really weird question

Okay so you know how when an animal or person makes it to where they can't reproduce, they get fixed?

Does that mean that they're broken before getting rid of their ability to make children?

HOW DOES THAT WORK?!

WHY WOULD THEY CALL IT FIXED?!

ARE THEY TRYING TO SAY THAT HUMANS ARE BROKEN BECAUSE THEY CAN REPRODUCE?!

I don't know...

Help me...

JUST A NORMAL AVERAGE DAY IN MY BRAIN!!