Why do churches speak in tongues

I was reading 1 Corithians 14 and it says a lot about how you should rather speak so everyone can understand you rather than speak in tongues, so now I’m confused on why people even do it. Isn’t the point of spreading the word of God so you can point unbelievers and outsiders to the right way of God so we should share it in a way everyone can understand? Idk I’m just confused, please give me grace in my question 😭