The value of it?

Even on a hot day road riding, you'll not soak your top whilst doin' it even if you're a few hours in the saddle. Except if the traffic lights keep you waiting . . .probably the wind generated helps to dry things as you're eating up the . . kilometres.
In the gym, a 30 or 45 minute course can leave you soaked despite air conditioning. It's high intensity, interspaced with short rest periods. My hr reaches 130 max, but I'm drenched when through.
I love it despite the obvious discomfort and feel much benefit as a result.
But sweating so much? Waddya think, guys?