Arguing is not everyone's cup of tea. For any person, it is difficult to keep calm when losing an argument or seeing one's long-held positions demolished.
Argumentativeness has its merit, as it helps good ideas prevail over bad ones. Those who possess the strength with a will for the same must indulge in it. But, for maturer persons who cannot tolerate the rush of blood in their arteries, polite conversations while raising doubts would be quite a good or even better alternative. A mature person would be in a learning mode to make other people realise the weakness of their points.
Unfortunately, it is rare to find people to express themselves analytically and be open to counterarguments. Moreover, most people are not mature enough to participate in polite conversations as I have made the case above.
Heated arguments and/or polite conversations ensure social good and facilitate progress. Tragically, people are either incapable or reluctant to do so. The reluctance comes from their ego as they fear a loss of face if their arguments do not hold ground.
People's egoistic nature does not allow them to exercise their minds. They, thus, allow mindlessness to prevail over them personally and publically.
Niraj Kumar Jha