Why binance has very different min/max buying limits for different currencies?

This is a genuine doubt I have.

I'm new to binance, and something I find super annoying is the way I can't just go there and buy whatever currency I want, due to the varying minimum trading values imposed by binance.

For example, in my country's currency, 300 pieces of it is the minimum required to buy a certain crypto. That equals 50 EUR. But if I buy that same currency with EUR, the mininum limit is 15 EUR.

I've been going through many toils by converting my currency 2 or 3 times just to get the one I really want, simply because the minimum value for an order in my own currency is ridiculously high compared to USD/EUR.