People get hurt when evacuating down the chutes - and a broken back caused when evacuating un-necessarily will also end in a law suit.
Quite honestly, the only time you can make the decison to go out or stay in is when presented with the circumstances on the day. No two incidents are identical, and hindsight will almost always prodcue a better plan than the one the crew had to formulate when under pressure on the day.
Both arguements have their merits, different airline have different ideas and there may be more than one right answer in many cases.
However, the point on tyres heating up for some time after the RTO is valid - that is why we also checked the brake cooling graphs before taxying clear.