That's the thing. They're not overdramatic or foolish. You are.
Science doesn't make these kinds dramatic pronouncements. There are hypotheses and guesses but these kinds of statements you're cherry picking draw conclusions without evidence. When a true medical expert makes such an estimate... it's always couched in hypothetical terms that can change as the evidence changes. In a lot of ways, this is unchartered territory... and as a result the evidence changes daily. The conclusions should change as the evidence does.