For those people who drive their own car, or don't want to valet, the self parking lot at the GF is a disgrace. For a "flagship" resort having the parking lot across the street from the hotel is just not acceptable.
Also, there is no reason to believe that guests at the GF either fly in with no car more so than guests who stay at any of the other WDW Deluxe Resorts.
As to not having a problem with valet parking I guess that if you can afford to stay at the GF you don't mind paying the daily fee, but I don't know how anybody would know if this was a problem or not without either being a mind reader, or interviewing all the GF guests and asking them for their opinion.