Because we are all addressing problems and issues every day, this skill is important and can have negative consequences if not acquired.
This skill is important because it allows one to make a global analysis of a situation at a given moment. It allows to work on communication skills (personal and with others), creativity, and team spirit. It also helps to assert oneself, especially when the issue concerns several people. Decision making allows to assert oneself, to cooperate, to negotiate. Finally, solving problems reinforce personal and group satisfaction.