And how about the number of toothpastes?
How come people haven't yet made a simple good enough basic way to make toothpastes? Are we still really not sure if it's good to put salt or charcoal or mint or whatever in toothpastes to make them good?
...or maybe there is a cheap standard toothpaste formulation but there's no money in that  nostr:nevent1qqsvkag4rawhvh8rv9qgh3dyueq3hxn5rtdufdgudrlzfe8pxvw5h8spz3mhxue69uhhyetvv9ujuerpd46hxtnfdutlqyxk