Fair, I'll take notion that it's their prerogative. However, my understanding is that it's not trivial to cancel one's order[0], though as both your and my source points out: it is possible, though an unnecessary hassle (particularly for a company that was partially made famous by making ordering their cars so easy).
[0] https://arstechnica.com/cars/2025/10/sam-altman-wants-a-refu...