That’s a bit hyperbolic.
If her family goes a long way back in the San Antonio area, she should research which side her ancestors took up in that conflict. From what I’ve read it was about 50/50 ... those who wanted to become part of Texas, and those who wanted Mexico to prevail.
I agree with her only to the extent that it was a classic fight over territory and dominion and that the textbooks and history make it sound like it was more than that.
It was "more than that". The defenders of the Alamo chose to die to the last man rather than surrender or abandon the fort. It is a battle unique in American history. One does not sacrifice one's life merely for profit or territory.