I agree electric doesn't currently make sense for semi trucks but it really seems like you are trying to argue that the downsides of a semi truck apply to a pickup truck when they are two completely different vehicles for two very different use cases.

Your whole point about the more weight you add reduces the range of an EV but you also leave out the fact that adding more weight also reduces the fuel economy of ICE vehicles. Most estimates say that for every 100lb of additional weight you can expect around a 2% drop in fuel economy. For an average size tow behind RV (6500lb wet) that's a 65% drop in fuel economy.

I do not know where you got "hours of down time to charge". Maybe you were looking at the level two home charging rates? The Ford F150 lighting is capable of charging to 80% (the recommended limit) in 36 minutes for the smaller battery and 41 minutes with the extended range battery using level 3 DC fast charging. I'm no math major but I don't think that's hours of downtime