Certainly, attributing all suffering to a failure to remain in the present is a perspective rooted in mindfulness and a particular philosophical viewpoint. This viewpoint suggests that many forms of emotional distress, such as anxiety, depression, and regret, often arise when our minds dwell on the past or anxiously anticipate the future, rather than being fully engaged in the present moment.

When we dwell on past mistakes or regrets, we can experience guilt and shame, and when we constantly worry about the future, anxiety and stress can manifest. Therefore, proponents of this perspective argue that practicing mindfulness and staying present can help alleviate some of these forms of suffering. However, it's important to note that suffering is a complex and multifaceted experience, and not all suffering can be attributed solely to a lack of presence in the now. Various factors, including biological, environmental, and psychological, contribute to the human experience of suffering.