Instead of trying to show them in negative light by calling them as "doomsayers" , let's call them one of the following instead, which is much better: "Realist

Instead of trying to show them in negative light by calling them as "doomsayers" , let's call them one of the following instead, which is much better: "Realistic", "Proactive", "Forward-thinking", "Prepared", "Cautious", "Thoughtful", "Analytical", "Mindful", "Insightful", "Security-conscious".