As many have noted, Wuerl already resigned as all bishops do at 75. PF hasn’t accepted his resignation but he could so today if he felt so inclined. As a liberal and prodigious fundraiser, Wuerl is a high mucky muck in the Bergoglio gang. If he’s still in power, it’s because they want him there.
You are correct. Wuerl is almost 78 years old.
The petition should have demanded that Satan’s spawn resign from the college of cardinals, and petition the Holy See for laicization.