It should not be seen as normal. Whether people or personal-management, it's a management problem. So is the need for the heroics you see when people are swamp

It should not be seen as normal. Whether people or personal-management, it's a management problem. So is the need for the heroics you see when people are swamped. People can't multi-task. Their productivity drops when they work long hours. Etc. Unfortunately, in software we're taught that it's not just normal but desirable. And our managers are untrained in people management, promoted only because they were good at their last jobs.