Hi there, May i ask why it's reccomended to do hot but not boiling hot heat baths ??

I'm not sure exactly of the science behind this part of the tek, But apparently some people prefer doing cold pulls, Some do luke warm heat baths, Some do very hot heat baths. Would boiling a pot of water and turning it off and placing the main mixing bottle inside be a bad thing ??

And let's just say hypothetically someone did use boiling hot water for the solvent heat bath stage, Why would this be a problem ??

Cheers