Originally posted by Suganya Ram: When should I use singular or plural names?
Originally posted by Suganya Ram: Why does Rails do pluralization?
Because it's more natural to talk about "an account" when you're referring to an object and "accounts" when you're talking about the database table that those objects are stored in. It just makes sense.
In fact, I can't remember anyone suggesting that we should name the database table as "account" in such a scenario. The Rails developers have just made that universal default a default in the framework, too. If you don't like that default, you can override it (but things are a lot easier if you follow the convention).