This trend may be part of feminism, to strip women of “feminine” voices.
When I was hitting my teens, I was lectured by more than one woman that my voice was too high, too girlish. I had to speak lower, “like a man”, to be treated as an adult and as respectable.
I lowered my voice because that is what I was told to do as an adult and to be respected. Then I scaled back my career when I had kids and received criticism that it wasn’t good enough for a woman with a college education.
It’s a fad like valley girl ditzoidism. Moving in herds; speaking in herds... They repeat the same phrases, too.
Had a girl over who my son was dating. She did this low garbled thing with a question mark after every second or third sentence.
About drove me nuts, but as my husband says, it’s a short trip.