For example, if someone spoke in French, I wouldn't understand what they said. But if they spoke in English, I would.

I mean I understand that it has its use in naming desserts, but it's just not suited for day to day conversation.

Imagine this exchange:

Person: "L'eau est empoisonnée."

Me: "What the fuck are you talking about?" Takes a sip and fucking dies.

Compared to:

Person: "The water is poisoned."

Me: "Oh shit no thanks" Lives

See how confusing it is? It's just hard to relate to on a human level.

How do French people put up with this?