I use reasonable precautions by toning in the open part of my basement with a door open not in my much smaller darkroom but certainly not a fume hood. I ain't dead yet. Be mindful but there's no reason to be afraid of it, just use reasonable care.

I print on Ilford MGWT FB developed in Ilford WT developer when I intend a warm image and then tone. It certainly isn't even similar without toning.