I was this person for ages. Our tap water had a taste growing up, and all the water fountain water in school tasted like pennies. I assumed all plain water was disgusting. My first bottled water was Dasani, so yeah, more shitty water. I assumed all bottled water was just as gross as all the other water I had.

As an adult, I had to transition off of soda to flavored sparkling water. Then, from that, to flavored still water. Now, I can drink plain water. Most people don't even try to adjust their taste buds.