Fitment matters on a full-size SUV because having a large vehicle does not establish that an accessory, passenger arrangement, or parking space is compatible with it. Model year, body length, trim, powertrain, seating, and factory equipment can all change the answer. Physical attachment is only one part of a successful fit.
A useful fitment check covers three areas: the exact vehicle application, the space and function that must remain available, and the limits of the complete arrangement. Apply those checks before buying accessories or assuming that a vehicle which looks spacious will fit your household’s daily setting.