Yes, there are too many bombs, magic arrows, potions...
Yes! Part of the fun of D&D, for me at least, is that people tend to specialize. You're good at some things, mediocre at some things, and really terrible at some things. A game where everyone has ready access to healing and can throw fire in some way means that your choices about classes and how you grow are kind of meaningless.
Make these things special because of their scarcity. Give me a game where the entire world only has two grenades and they may not even work because they're prototypes. If the world is lousy with fancy arrows, for example, isn't that going to make playing an arcane archer feel really lame? I want to do things that no one else can do.
