You should think about that for awhile, you will see that they do it on purpose.
prices are based on:
Utility (can it actually do something to make your life better)
Desirability (do you want it?)
and
Scarcity (is there enough to go around?)
horse shit is super useful, not very desirable, and not at all scarce, thus is it cheap.
strawberries are super useful, super desirable, but not at all scarce, thus, cheap.
diamonds are super useful, super desirable, and there simply are not enough for everyone who craves them, so they are super expensive.
if you found a diamond mine while digging an outhouse for your cabin in the woods, you would be rich as a motherfucker, but if that mine has so many diamonds it raises the worldwide production levels, the price will drop because more people are selling more diamonds.
NOT digging every diamond you can find causes the price to stay higher, and since you cant make more (economically) husbanding that resource for maximum profit is well worth the effort.
every time salvatore dali or andy warhol signed a cocktail napkin with a doodle on it that doodle was worth a shitload. if they sat around doodling and signing cocktail napkins for weeks on end, these artifacts would rapidly become worthless, so they didnt.
of course they do it on purpose. if your finite resource becomes infinite, then it becomes practically free.
theres nothing wrong with protecting your product's value at all, which is the basis for Tariffs.
cheap imported shit drives down prices, so YOUR people go hungry while the importers make out like bandits on volume, as long as the price stays significantly above cost.
when the price of imported goods falls below the cost to acquire and import, then they simply acquire and import something else with a high margin.
thats capitalism, and thats why we NEED tariffs, and an end to "Free Trade" which is actually just Expensive Trade with a better PR team.