I was todays years old

I upvoted- but to be fair some of the “obvious” uses of common things are most easily mossed because many people don’t need them so never think about them. If you aren’t worried about breaking nails or don’t have sensitive fingers etc, you’d never likely think there’s a tool to open a tab top can since 1. They’re easily opened for most, and 2. The whole point of that can design is that you can open it without a special tool. Those who don’t often use bottle openers (consume bottled beverages) are also likely unfamiliar with bottle openers as they likely don’t carry them, or operate/interact with them often.