You want to get an economist to shut up? Point out that we're now in a situation that for nearly any physical good, one producer
is able to saturate the market, that nearly every factory is operating below capacity, that individual farms are so big they can easily produce what an entire state needs and in fact operates below capacity for financial reasons. Both factories and farms: A LOT below capacity. Because 1% of a modern factory's capacity is able to saturate a very large local market, and the rest depends on international treaties, not on supply, demand, or even price.
Which means increasing supply for just about anything ... doesn't actually change price, and in fact the issue you're pointing out is not just one of the influences on prices, but almost the only one.
The market is saturated and producers have no incentive to lower prices, for nearly every good. Which means increasing supply ... does not lower prices. Increasing demand does not raise prices ... that's just not how it works anymore.
The only influence on price is international relations, or to put it more bluntly: various kinds of taxes are the only influence on prices (going from import/export tax, vat/sales tax, subsidies, raw material availability (effectively mostly meaning a tax in the form of export restrictions), what loan conditions are for good X, ...), and so economics just doesn't really apply anymore to the vast majority of goods.
The price of widgets from water balloons to air fryers is controlled by government subsidies in particular countries.
The price of houses is controlled by mortgage conditions, which are set in law. Meaning they are different between countries in both ways that matter (so, for example, Freehold vs Leasehold, Australia's Negative Gearing, whether 30 year fixed price is available, immigration policy, whether foreign investment is allowed ...) and in weird ways that don't matter. Supply and demand don't control price.
The price of labor and services is around 80% tax in most of Europe. Measured by taking $100 that the employer pays to have labour done, so including for example France's "patronal" tax, compared to what the employer would receive and not have to pay to the government in his bank account if the employee chose to spend all of his pay on whatever his labor produces. Yes there is still some supply/demand here ... but not much.
The problem is that for nearly everything "taxes" (as in taxes and tax-like regulations) determine who produces, and the tax swings are so large (going from -10%, yes minus, to 80% and more) depending on location and good, and their effect swamps any economic concern in nearly all sectors of the economy.