Let’s try this again. I never said don’t go off-road. I cautioned about over confidence as illustrated by the example of a guy in a sedan who had done it before so he can do it again. The hazards and considerations to venture out in a 2WD are greater than a comparable 4WD vehicle. A previous post gave an example of a trail with dry conditions. Take that same trail in a thunderstorm or snow and it becomes a whole different scenario.
This debate was first brought to my attention around 2007 when Jeep offered a 2WD Wrangler, which was insane to most of us Jeep loyalists. There was many a post on a Jeep forum by those who said they either didn’t need 4WD or could do everything most every 4WD Wranglers could do. Over time, the most vocal defenders of 2WD Wranglers traded them in for a 4WD Wrangler and never regretted it. Jeep also realized their mistake and discontinued the 2WD option in the Wrangler.
It may not always be practical when overlanding, but it is always best to go out with another vehicle and this is especially true when off-roading in a 4WD vehicle because of the susceptibility of being over confident because of the vehicles capabilities. But my point was a 2WD vehicle cannot compete with a 4WD and the driver will find themselves in trouble more quickly in conditions a 4WD would navigate effortlessly. There are plenty of times we head out in 2WD and never shift to 4WD, but we know we always have that options as conditions dicatate and change. Add to that winches and other recovery gear that allow for self-recovery or assisting another.
To the OP, the bottom line and my point was know your limits. And if you are going to push those limits, it’s not wise to do it alone. Get to know the capabilities of you and your vehicle. You also need to make a choice to equip your current vehicle to make it more capable (tires, lift, recovery gear, etc.) or limit the upgrades to save money with the goal of purchasing a 4WD vehicle. I assume, and that can be dangerous, by asking the question about the limits of 2WD in first place mean you are thinking about it and the idea of a 4WD vehicle is certainly of interest