Is it really useful to make a wish in a temple?

Very effective. I believe. My friend once made a wish in the temple. Really smart. Later, she went to the temple to thank the gods. Sold a lot of things to worship Buddha. As long as you are sincere and pray sincerely, it is very spiritual. But after enlightenment, thank the gods. Try it if you don't believe me. Make a wish in the temple, remember to be sincere.