theres a myriad of things one could focus on. "the miles" and all the civil war history are but two of them. someone choosing not to focus on one of them does not mean they are focusing on the other.
you have to love binary thinking.
the hiking in MD is nothing special. its hard to argue otherwise. the historical sites might be fabulous, but that has little to do with hiking. especially as they are all accessible by motor vehicle.
but even if one is a fan of the history, i still have to wonder...
MD is about 40 miles. if one were to take 4 days to hike it, assuming equal days, thats 10 miles a day.
it is very easy terrain. whether you enjoy history or not doesnt change the fact that anyone who is an at all capable hiker should find the actual hiking part easy. so lets go with a hiking pace of 1.7 MPH (still awful slow for the terrain.)
at 1.7 MPH, 10 miles a day is covered in a hair under 6 hours. throw in an hour lunch break and an hour miscellaneous breaks and you're at 8 hours.
if one begins their day at 8am, those 8 hours brings you to 4pm. how much daily time can really be spent at the various sites of historical significance? even to a history buff, is gathland state park a place one can spend 3 or 4 hours drinking in all of the history? its my impression that it isnt. i could be wrong. but even so, does one encounter at least one such place on all 4 days of a theoretical 4 day hike? i'm not sure one does...
my point? even if you love history and stop at all the historical spots and really take them in, i tend to think spending 4 days hiking MD involves a lot of sitting around camp not doing anything. if thats your thing, more power to you, but someone who doesnt want to sit in camp until 9 am and then stop hiking for the day at 4pm is not "just concerned with the miles."