Need some help with options?

• stock options trading
• apple stock options
• htm stock price
• purchase price of stock

I understand how they work but it sounds like the option seller has a lot more risk. All they get is a premium for the contract and if someone has an option going the wrong direction, they can always let it expire. But if it goes in favor of the buyer, the seller will have a huge bill to pay when they exceed there strike price.

Why would someone want to be a seller when there is so much risk while the buyer only has the risk of paying the premium?

Additional Details

Bullrooster... what if the stock keeps going down and they still own them? Can they not sell them until the option expires if they are not exercised, causing a substantial loss?

Need some help with options?