A car dealer advertises an astoundingly low price on a car and when you go in to take a look, they show you the one with upgrades (like air conditioning and a radio). It's standard business practice. What makes you think builders don't do the same thing? Of course they picture the upgraded model. And you can have that model. But prices start at the low price for the basic builder grade model. If you want that air conditioning and a radio, it will be extra. Like any other "upgrade" in any business.

I realize that upgrades are always extra, but this is the first time I have EVER seen floor plans showing a pool and not be included in the cost. It would be like showing a room being 20x20 and then saying the actual size is only going to be 10x10

"It would be like showing a room being 20x20 and then saying the actual size is only going to be 10x10"

Not even close to misstating a room size (and even that is as likely to be a copy error as anything intentional).

Advertising puffery is NOT a contract.

They do that here in Louisiana too. That's why you call and ask questions to make sure what is and what is not included in that price. In very small print sometimes on the flyer, it will say that some of the items in the floor plan are not included in the "sale" price. It's like going to the furniture store where the price is $2300 for a bed but the mattresses, pillows, and bedding are not included in that price. Same practice.

"It would be like showing a room being 20x20 and then saying the actual size is only going to be 10x10"

Not really.
It's more like showing foundation plantings and trees.... things not actually part of the house.