I wouldn’t be surprised if the people that are upset about Lucy Maclean and Cooper Howard being shipped are those from outside the fandom, and just barely got into Fallout.
They would’ve known by now that shipping ghouls is quite popular. No one in this community really cares about a stupid age gap. Fallout has presented us some freaky stuff over the years. Marry Me FISTO. The most popular fanfics from Fallout 3/4 are with ghouls (John Hancock, Charon, etc). Don’t be discouraged by the popularity of it, just write and draw the ship you want more representation of, and don’t be a dick.