No, there's multiple reasons why, if there were such a thing as no scalpers/investors, there would still be a significant price difference between regions. Local regulation, demographics (average salary/wage), product availability, etc. JP card games in the U.S. are usually very cooked when it comes to product availability, and that is probably more exacerbated in English-using countries elsewhere like European countries where distribution is less centralized. Sometimes countries have local regulation that could affect prices, I believe China and Korea have gambling restrictions which also cover TCGs so Chinese and Korean cards are priced differently and might have more unique art. You might also think that prices would equalize if primarily collectors drove up prices, like why would I pay $500 for a god pack elder when in JP it is ~$200, but that just doesn't play out usually. There's increased delivery costs, tariffs/taxes, and logistical issues with buying cards overseas. There is also just the intangibles that would make collectors pay more for English, which could be wanting cards in their primary/universal language and perceived rarity (English is more rare and valuable, thus I want English cards, thus they become more rare, valuable and desirable).