The 2022 Maverick has an engine literally twice more powerful than the 1962 F-100 (270 vs 135 hp). With your logic, picking on one tech detail of many, I could argue the 1962 model is "not really a pickup truck" with such a puny engine of weak towing abilities !

What this shows is that Ford merely decided to trade 18 inches of pickup box space for a second row of seat, a more powerful engine, and many other higher-end specs. Today Ford could definitely make a 1962-spec'd pickup with a weak 135 hp engine at less than $20k.