From the day Adam learned about the World Wipe from Wilfred, all his thoughts revolved around this inevitable threat.
The conversation with Douglas, Damien, and Mariam did not improve the situation at all. On the contrary, everything became much worse, and even Silvana's agreement to start a family with Adam after the World Wipe had only a negative effect on him.
Sure, besides the World Wipe, what Adam saw at the Dark Shore also had a strong influence on him.
The power possessed by the True Lords, and therefore by Phantoms like Damien and Frida, was beyond his comprehension.
Adam did what most people in his position would have done — he chose the best option available to him, which was to start over after the World Wipe with Silvana.
Well...
There was another option — to stop the World Wipe, the battle between the Last Star and the First Star, once and for all.