Because no reasonable person would sell BTC for Peso, if the goal is explicitly to drop the Peso. That is the main reason why it is stupid.
Discussion
If there's a market then let it be done. If not then the currency is already worthless but obviously that's not the case as you can still trade 🇦🇷 peso for USD and then USD to #BTC so then at this point they (the Argentine people) still can use their political currency to buy the hardest asset that humanity has ever known, #bitcoin