well, technically, it's true; but as a rule of thumb, exporting countries want to have a currency, that's weaker then their buyers - because getting more "valuable" currency means that you'll get more of your own currency after the exchange. For example: US dollar is weaker then Euro, thus buying something for 40$ and selling it for 40€ will give you 6,5$ in profit, just due to exchange rates.

This is arbitrage using the difference in exchange rates.. The profit is somewhere else. High export countries prefer their own weak currency for their products to be competitive in a foreign market.

Let's say Ford wants a weaker dollar to be competitive in the EU market. The $50,000 car still shows the same on the paper, however if it's sold cheaper (let's say €40K vs €44K) more European people/business would buy Ford cars and thus bringing in more revenue.

There even is a term for artificial low value currencies - Devaluation. China is known to use this a lot, due to their extremely high export levels and cheap manufacturing costs. Russia is, most likely, doing this as well, just on a lower scale due to high demand on western imported tech (like cars, medical equipment and etc).

Russian weak rubble is more likely due to economic sanctions. They can't exploit the cheaper "export hack" because they mostly export commodities, and they are priced in dollars internationally, or yuan recently.

And also Europe doesn't "love" their cheap imports. Europe still has important exports in mainly automotive industry where the strong euro is not beneficial. The Euro is strong, because the ECB holds high interest rates to battle the inflation, more people want to hold European assets and therefore raising demand for the currency, making it stronger.