Yes I would run around in that outfit in 70° weather for some tail :D
Point taken though :)
And I would have too, when I was young and stupid (talking me here, not you). Immature bucks do the same. Mature bucks are far more like that old bull in the joke about the young bull telling the old one that he's going to run down the hill and breed a cow. The old one replies that he's going to walk down and breed them all. A mature buck is likely to lose 25-30% body weight as is during the rut. He can't afford to waste a lot of extra energies or his odds of surviving winter drop like a rock off a cliff. For Midwestern and northern deer, running around all day in their winter coats is the definition of wasting extra energies.
All that said, to this day one of the best hunts I ever had was in IL, mid Nov with temps in the 80s. I was setup right in an overlap between core areas of several mature bucks and a doe bedding area. Get close to where they're bedding and it can be a blast. Setup a couple hundred yards further away on a food source and that same day you'll be lucky to see a squirrel.
Flip side, just spent the week in IL with temps in the high 60s-70s. Passed a broken up 4.5 and a bunch of younger bucks in the AM in 2 AM sits (had projects that stripped me of the rest of the AM sits). Too high of impact to get closer to the core areas of any of the 3 bucks I wanted for PM hunts. So, I hunted lower impact tagging plots around them. Never saw a buck over 1.5 in the PMs, despite being able to hunt every PM.
Had a couple management buck hunters with me and set them up on food sources close to the bucks they were hunting. At least 1 of the 2 hunters saw 3.5+ bucks each PM. Unfortunately, they either weren't management bucks (such as the 5.5 that worked the scrape tree 3 times and walked less than 5 yards past his blind) or the management bucks were heading their way, only to get distracted by a girl.
Take it for what it's worth, but that's how I try to beat the heat and how it played out last week.
P.S. In woods water sources somewhat close to daylight ore areas can be solid choices, too....Even in states like IA, MO & IL, where they generally are duds (unlike WI, MN, MI, PA and other northern states, where water holes can be fantastic all season long). Stupid high temps are the difference makers for water holes in those states where they typically don't produce much action.