Whole Selling Vs. Becoming a Real Estate Agent

Okay so I'm completely new to this concept of Whole Selling. I keep hearing about it on the BiggerPockets Show. What is the difference between whole selling and just being a Real Estate Agent? Neither party is looking to keep the property or do any work to it. Both a Real Estate Agent and a Whole Seller are looking for someone else to close the deal. Isn't it simpler to just be a Real Estate Agent and get paid that 3-5% fee vs a flat $2,000-10,000 fee for whole selling?

Putting a property under contract to assign to a third party upon closing or double closing on a property just sounds complicated and unnecessary to me.

You can still market to motivated sellers the same way right? You can still pre qualify deals to make sure they meet investor requirements to rehab and make money.

There is something missing that I don't understand here. . .