Why isn't the Dodge and lineup regarded as reliable?
Ford E-series is how old?
Most of Nissan's sedans are pretty long in the tooth now that I think about it.
A large part of why Toyota stuff is so reliable is that they're expensive up front both new and "newish" used. They also won't finance just anyone with a pulse like the "unreliable" brands will. So the people who get their hands on them can afford to maintain them on schedule and can afford to treat them well. You'll never see a newish Sienna owner stacking one floor to ceiling with bags of concrete to avoid paying for the Home Depot truck rental. You'll never see a newish 4Runner bouncing down the road with an out of round tire. You'll never see a newish Camry dragging ass hauling a family of 5 and all their luggage (the person with that use case in the Toyota tax bracket can justify/afford a Highlander) Can't say that about a Pacifica, Patriot or Altima.
Refinement certainly helps but Toyotas are reliable because any car would be reliable in the hands of Toyota owners. Any car would routinely make it to high mileage if they got babied for their first 100k (or so)