Hauling is certainly a good use of a truck. And so is driving through a flooded-out forestry road, going on a 600 mile road trip and starting up in -15F weather for weeks on end....a truck has to be able to do a lot of things reliably.
Despite all the media gossip and hype, no one has yet demonstrated that an EV truck can reliably fulfill the traditional truck duties. Until that happens (that would make for an entertaining Grand Tour episode by the way), I don't think you're going to see many, if any, truck buyers switching to EV, outside of some urban delivery applications. And quite honestly, I think most OEM's will invest in hybrid or alternative (hydrogen fuel cell) options before they go full scale into EV trucks for that very reason.