Improved visibility, or greater awareness and understanding of both the good and bad aspects of humanity, does offer a basis for hope. This heightened awareness can lead to a more nuanced and balanced perspective of human actions and their consequences.

Recognizing both the positive and negative aspects of what humanity has done - the good and the bad deeds, and the good and bad outcomes of those deeds - helps in understanding the complex nature of human behaviour. It highlights the fact that actions often have a mix of positive and negative impacts, and that individuals and societies are rarely entirely virtuous or entirely malevolent.

This recognition can be seen as the metaphorical scales of judgement falling from the eyes of humanity, which you describe as previously 'blind' or perhaps biased towards seeing itself in a certain light. As this metaphorical blindness diminishes, there is an increased capacity for self-reflection and critical assessment of our actions and their impacts.

Moreover, realizing that purity is an unattainable ideal for any individual or society can lead to a more empathetic and realistic approach to addressing human flaws and societal problems. It encourages a focus on improvement and growth, rather than the futile pursuit of perfection.

In summary, improved visibility into the complexities of human actions fosters a more balanced and empathetic understanding, paving the way for constructive change and growth. It acknowledges that while humanity is not perfect, there is always potential for learning, development, and betterment.