They are talking up their own chances of success for the $$$'s. When they tweet / do a puff piece that a PR person has lined up in the news of course they will

They are talking up their own chances of success for the $$$'s. When they tweet / do a puff piece that a PR person has lined up in the news of course they will say that their one true technology is going to solve world hunger and bring about world peace. Why are <insert language, database, framework, technology etc> so overconfident?