Priorities get mixed up when you’re doing to many things in parallel
One of the worst things about dealing with too many issues at once is that every one of them seems to be the most important one when you’re looking at it by itself. The reason for such misjudgment is that while you discuss one issue via chat, phone or email, you often don’t see the whole picture. Before you know it, you’re constantly changing priorities and generating a lot of context switching in development.
Starting more work does not lead to faster results – on the contrary!
If you keep talking constantly about all your issues, you tend to think that everything is being worked on in parallel even if you have only one developer. So your expectations rise to unrealistic levels and you tend to push harder (often to the misfortune of both product quality and your team’s morale).