More of an historical monument than we might currently care to admit

Does the highlighted sentence mean "it is perhaps the time that we have to stop and think that maybe this installation by Lerman is more than what we think a historical monument reminding of the lost environment around this dam" that is "this installation instead of an encouragement to change our behavior toward the environment is more of a mourning for the lost environment" that is "everything is more too late than we think"?

Context:

The installation Hoover: Water/Power brings together audio, video, and mixed media components to represent and reflect upon the Hoover Dam as an energy- and water-generating facility that continues to displace and marginalize the fragile flora and fauna of the Black Canyon. Lerman also juxtaposes an arrangement of 437 stacked recycled plastic water bottles next to his video projection of the dam. The bottles create a quantitative graph or chart of the fluctuating water levels at Hoover Dam since it was opened over 70 years ago. The results are not particularly encouraging, since the water levels at the Dam and at Lake Mead continue to plummet. Lerman poses the question of whether, given its declining output, the enormous economic and ecological costs of keeping the Hoover Dam online are at all sustainable. Like the Harrisons before him, Lerman suggests we rethink the situation of water in the regions where we live and work. It is perhaps time for Arizonans and others to pause and deliberate whether this great modern icon is perhaps more of an historical monument than we might currently care to admit.