For the record I do believe it is important to take some time off. However, each individual needs to make that decision about when is the right time. Health is important and so is performance. It is another risk vrs.reward thing. We all know the safest thing is to NOT pitch.
I don't really care if anyone wants to believe it but the summer and fall is the best recruiting and scouting time. The biggest scouting attraction, by far, in all of baseball is at the end of October each year in Jupiter Florida. I'm going to list a bunch of pitchers who later pitched in the Big Leagues that pitched in that late October event while they were still in high school. Not sure it means a lot other than they did it and it is extremely common. I could name many, many more.
Jose Fernandez
Shelby Miller
Gerritt Cole
Matt Harvey
Rick Porcello
Drew Storen
Dylan Bundy
Kevin Gausman
Tyler Skaggs
Zach Wheeler
Tyler Chatwood
Michael Roth
Steve Rodriguez
Joel Hanrahan
Jonathan Sanchez
Matt Cain
Zach Greinke
Scott Kazmir
Mike Pelfrey
Jon Broxton
Johnny Venters
JP Howell
Corey Kluber
Tommy Hanson
Tyler Clippard
Nick Adenhart
Homer Bailey
Chad Billinsley
Ian Kennedy
Chris Perez
Daniel Bard
Jacob McGee
Mike Minor
Buster Posey (pitcher then)
Chris Valstad
Travis Wood
Jeremy Hellickson
Daniel Hudson
Ross Detwiler
David Price
Matt Wieters (he pitched)
Gio Gonzalez
Yovani Gallardo
Javier Guarra
Blake Beavan
Stephen Strasburg
Jeff Locke
Zack Britton
Kyle Drabek
Lance Lynn
That's not even half of them.
Again, not sure it answers anyone's question regarding pitching in the Fall or resting. I will say that resting is always "safer" than playing. No doubt about that!