I have learned something even though you sit at a desk and write a book. . . you technically never write alone.
You have you characters and muses arguing with you. They always want to go into the scary woods even though is not planned and 20 days off your writing path. LOL
Then you get the beta readers who give suggestions, some good and some bad. It’s like advice; you can take it or leave.
Then editors telling you change the same scene three times and then they are fine with the original . Grrrrrr
So in the end you really are never writing alone.