Whether you think you can or think you can't, you're right.
Everyone has seen the Olympics right? Humans at the peak of their sport, pushing the boundaries of what is possible. These people have thousands to tens of thousands of hours of work behind them.
No one sits on their sofa watching the fastest or strongest people in the world and says "you know what, I think it's better if they went slower. More thoughtful. I'd prefer to watch a few slower better races than this".
Amanda is right - you can do amazing things. For myself, my writing speed has increased incredibly over the years. I switched to dictation and have had astonishing results. Wrote a book in five days, made a giant pile of money. Has excellent reviews, is funny and detailed and full of plot twists and turns while fitting into a long series. It's a wonderful book.
I've also slaved over a book writing by hand over a long period of time and it's not as good, doesn't make money.
There is no connection between speed and attention to detail, quality, care, love of the story. None whatsoever.
If you were put into a job where you had to produce clean copy under tight deadlines or get fired then guess what, you'd probably be able to do it. People do it all the time. You can learn to produce almost perfect copy first draft. You can learn to speed up your writing. You can learn to use tools like dictation.
Saying that people can't or it's better slower or there is some lack of care there is like watching the Olympics and wishing it wasn't showing humans at their peak.
I loved the podcast, I love her work ethic. She's producing well-written books with intricate storylines and making a giant pile of money at the same time. She is someone to be studied to learn from.