You keep referencing “light duty”. What’s your definition of “light duty”? Light or heavy duty only matters in terms of how you use your vehicle and I think you have a misconception of what that truly is. The 150 and 250 platform is used worldwide in rural areas like Thailand, Africa, South America, Australia, Middle East. They’re used all over the world in some rough ass terrain in stock and modded configurations. I think you’d be shocked what “light duty” 5th gen 4R, GX460, LC250 or GX550 can do. There’s plenty of examples of that on the forums and socials. Plenty of these “light duty” vehicles have done trails in Moab, the Rubicon, Uwharrie, SW Colorado with ease. I think they’re more heavy duty than you give them credit for. These vehicles have more capability than you (and most drivers) have skill. I had two 5th gen 4Runners that I took on trails that Jeeps on 40’s were surprised I could do on 32” tires, solo no spotter.
If you are a city dwelling, flatlander that is just trying to brave city traffic, rainstorms or the occasional tornado in Dallas then what does it matter if you have a 200 series vs a 4Runner/LC-Prado/GX? In that situation it doesn’t matter what platform you have because that’s just normal city driving. Those aren’t “heavy duty” required driving situations. The question is what do YOU do that requires a “heavy duty” vehicle that you don’t believe a 150 or 250 is suitable for? If your answer is that you feel the 200/300 series is more robust and luxurious then that is fine but let’s not minimize how capable the 150/250 platform is. If you feel better about yourself by saying you have a “heavy duty” 200 series then just say that.