This is due to the fact that eggs are notoriously unpredictable and picky:
The identical processes that, on one occasion, result in a perfectly fried egg can,
on another time, result in a mess that is stuck, cracked, or slimy.
This is because the circumstances of the eggs and the equipment that you are using can vary.
Eggs can be difficult to cook if you want them to be perfect.
Nevertheless, the majority of us struggle through batch after batch, and we typically end up with satisfactory outcomes.
Eggs that are fried with runny yolks and those that are fried hard both have vocal champions.