NO!
Just because you have one C-section doesn't mean that you have to have your next baby the same way. Having a natural, vaginal birth the next go-round is entirely possible! And I urge my students to try going that route, if need be.
Here's a great article about what a VBAC -- vaginal birth after C-section -- is and who is a good candidate for one.
So, while I want to stay focused on the positive and have my students leave class feeling empowered and equipped for the natural birth they want, I also want them to be ready and prepared for the unexpected. And, if they do give birth via C-section, for whatever reason, I hope they might consider having a VBAC if they have another baby in the future. Everything they learned in class the first time will apply for baby #2! :)