The differences between the efficiency gains of using gas/diesel over using a horse were staggering and the arguments you quoted hypothetically would be idiotic. That said moving to electric is a not-negligible efficiency loss.
184 horses in 10 days to go coast to coast (1900 miles) carrying a single pouch required 184 changing stations on the route: Pony Express
1 Ford model T running the same trip would have a tank range of almost 145 miles (est 18mpg * 10 gallon tank with an 8 gallon draw). This makes a need for 14 fuel stations on the route, about 8 days or less travel time assuming 12 hr driving days and capacity for 50 or more travel pouches equivalent to what the pony express had.
A clear efficiency gain using early affordable automobiles. Compare that to the current transition we're facing:
1 Semi in roughly 3 days (assuming average 55 mph speed and 11 hrs of service per day after every 10 consecutive hrs off-duty) on a similar route with a gross weight between 30-40 tons, required stopping only once on the way to fill up 225 - 300 gallons of fuel and 30 minute breaks after 8 hrs of active driving.
1 Electric semi going the same distance with a presumed 400 mile range (information on google is sparse as far as the range of a pure battery powered Semi truck) will mean a required 90 minute (or more depending on number of chargers vs chargers in use) stop every 6 - 7 hours of drive time at least 5 times during the trip to recharge. Oh...and with trucking, 30 minutes for an 80% charge is not going to cut it, the battery needs to go 100% to get the max range they can between stops
Since the 11 hrs of service max is read from the end point of the 10 consecutive hours off-duty, recharge/break time does not figure into it, so in reality a Diesel Semi is going to have 10.5 hours active drive time (577.5 miles) and the Electric Semi is going to have 9.5 hours active drive time (522.5 miles) or significantly less as the more ubiquitous electric freight gets, the more wait time there is to get a bay. Losing half a day's drive time on waiting to recharge and actually recharging would not be an unreasonable estimation. That means the 1900 mile trip would take about 3.29 days using Diesel and 3.63 days at absolute best using Electric. In trucking, losing over 1/3 of a day in the course of a haul is a major setback as it can mean the difference between getting the next load that day and getting a head start on the next haul, or having to wait until the next day (or more) for a hookup.
This shows that there's a clear efficiency loss in going with mass produced electric. I'll grant you that the loss is not as drastic as the gain from going from Pony Express to mass produced auto; but the parent's argument of excessive charge times being a real problem is a valid one that needs to have a "good enough" solution before we start pushing forward with electric vehicles everywhere. We're not there yet. We're not even close to satisfactorily solving that problem for mass scale use.