Of course, all else being equal, the longer wheelbase tow rig will be more stable than a shorter wheelbase pulling the same trailer....any trailer.
But I don't hear anyone griping, saying it's irresponsible to pull that 40' long 5ver with that long bed pickup truck. The wheelbase to trailer length ratio may even be more in favor of the Tahoe/25' trailer.
Other factors involved too. I've pulled many different trailers, type, weight, length, profile etc over the years. Way more than I can count on fingers n toes. Some trailers pull better than others either due to design, loading or conditions. With TTs there are ALOT of variables due to the large market and many different offerings. Also due to what sells.....floor plans! You take the DW camper shopping and what does she want? Rear kitchen, 3 bunks, no bunks, king size bed, loves the storage under the front bed, etc.
you've never towed that trailer before and the old lady probably isn't even getting behind the wheel once it's hooked up, but you don't want her griping about having the spice rack too far from the stove for the rest of your days, so guess where the priority gets placed???
RV mfgs know this and they market it, aggressively! Better to sell you your first trailer from them than none at all. Tows like a hay wagon? We got the solution! Bust out the card, here's your $1200wdh, super microprocessor controlled anti sway device, airbags, add a leafs and some new muffler bearings! She'll tow like a feather and the wife won't have to reach across the table for the oregano and thyme when making you that dinner fit for a king after you white knuckled it out of Joesemite Park while she updated Facebook on her iPad from the passenger seat running off the wifi hotspot in your new TT!
2016 Ram 2500, MotorOps.ca EFIlive tuned, 5โ turbo back, 6" lift on 37s
2017 Heartland Torque T29 - Sold.
Couple of Arctic Fox TCs - Sold