I guess it's just a nod to PD's passion for automotive history more than anything else.
Like someone else mentioned, people will set a few times on the climb, will get bored and then move on..
Pretty much this. The issue here is PD "wasting" time/resources painstakingly recreating a venue that will have very little use.
Its like forzas autovista mode, its cool but you really use it very few times.