Stablecoins can’t address the inflation issues, they just follow it and so far USDT and other stablecoins remain stable despite of the inflation. You cannot just create or print stablecoins, it requires a lot of works so technically the supply is not that big but still they are able to maintain its value. There are some country who are using USDT already because of the high inflation on their country, this serves as an alternative for them. Cryptocurrency can address the inflation, or at least gives a higher value compare to fiat money but you must consider volatility first before trying any coins/tokens.