When we were there mid August they were having a heat wave (which is very common) so the "average" temps didn't apply. Our 1st day in the parks it was over 100 degrees and for someone who thinks 80 is like sitting on the sun- it was too hot!
We planned for this and used our MM, got tons of stuff done early morning and then vegged out mid day. We were staying offsite about 20 mins away, so leaving mid day just didn't make sense.
I will say that perhaps it's more difficult for families who have not only a stroller but someone in an electric wheelchair. Not sure if you've ever traveled with someone in a wheelchair in the middle of August but people DO NOT move out of the way. Thus the rudness and other unattractive qualities emerge... It's very difficult and slow moving just to get from one attraction to another and forget about actually moving during a parade or Fantasmic.
Frankly, the only reason we ever went in August was because we had a terminal family member that we were visiting and there was no way she would still be alive during our original trip planned for Nov.
Quite honestly I think that folks are so excited about being there that they are willing to overlook some negatives. I know that growing up, my parents took us there every summer- because with 3 school aged kids and 2 working parents- that's what worked best for them. However, once we got older, we always went in Nov because the weather was so much better and you could see more of the park (DCA wasn't built yet) in less time.
If that works for you- then great!

I would much rather you be there during the months I hate and leave me to enjoy the parks when it's cooler and less crowded!
Do what works best for you- just consider all the pros and cons beforehand!