

Exactly. Sarah is well aware that it’s not a pencil and paper that’s out of reach for most people, but the time, effort, and talent it used to take for an individual to produce anything worthwhile.
She doesn’t like that the ability to make the pictures in your head appear in real life has been opened up to everyone. She’s strawmanning to gatekeep just like the boomers who say “I had to pay for my school loans and so you should too”.
“Open sounds” (which, I assume, refers to continuants) and bilabial sounds aren’t mutually exclusive.
When you pronounce the /w/ at the beginning of “one”, your lips round (purse) and touch each other at the corners, but they don’t form a full closure. So, the oral tract is still open, but the articulators (moving mouth parts) are still touching.
This could be reworded as “the middle of your lips don’t touch each other”, but multiple commenters are correct in that your lips absolutely do touch each other when you say “one” in English.