Yes, if they just paid people to record their voice they would not get training data for real use cases.
I cannot find the blog post now, but quite a few years ago I recall some Google employees noticed a large number of queries for "cha cha cha cha cha..." from Android users in New York. All of the queries were done using voice search, so they listened to a few of the recordings. It turns out that their speech-to-text models were interpreting the sound of the NYC metro pulling into a station as speech.
Obviously they didn't have enough training data of people trying to talk next to a train.
I cannot find the blog post now, but quite a few years ago I recall some Google employees noticed a large number of queries for "cha cha cha cha cha..." from Android users in New York. All of the queries were done using voice search, so they listened to a few of the recordings. It turns out that their speech-to-text models were interpreting the sound of the NYC metro pulling into a station as speech.
Obviously they didn't have enough training data of people trying to talk next to a train.