I don't understand why anyone uses the DM functionality on Twitter except in the most extreme emergencies. Even if the security problem noted here didn't exist

I don't understand why anyone uses the DM functionality on Twitter except in the most extreme emergencies. Even if the security problem noted here didn't exist, Twitter DMs are always one character or click away from being accidentally broadcast to the world. Almost every day I see a misdirected DM in my timeline; almost every week there's a news story arising from a misdirected and sensitive DM. Do other people seriously have this much trouble finding an email address for someone?