For starters, as other poster already noted, it is not ATP that runs the GS tournaments.
You indicate that you literally don't know that.
Then comes the mumbo jumbo about "unfair" treatment, when in this thread it was demonstrated that:
1) both players were approached the same way
2) Cilic's chances indoors are better than his chances outdoors
The extreme heat policy is in place, because people should be aware that in some circumstances the play can be postponed, matches moved or not happen at all. It is a business.
The organisers try to find the balance between running that business successfully and not endangering players' health.
Apparently they are erring on the side of pushing for more profits, but that has nothing to do with a preferential treatment of one player over another.
The fact that you do not indicate that you understand the above shows that you never had to make important decisions that can cost quite a bit of money without the certainty that they will affect the organisation or the business in the perceived way, hence the comment that you found so funny.