You can go, but the food festival is not free
You need to pay for everything you eat, which may be cheaper than usual stores. Some, but not too much. Basically, it’s at a tasteless price point where you won’t feel anything after eating it and will regret not eating it.
So, if there is any food festival, it is still okay to go and see it. If it is inland, seafood like that is much more cost-effective than usual. Besides, it will be It's just a taste, so I won't waste a lot of money.