Like many things in life, it depends.
I agree that for a day's drive on a road trip, a destination charger will take 3-4 hours to receive enough charge to drive another 200+ miles, and this assumes that you have the old-fashioned dual chargers or the new-fangled 72A charger and the destination has 64-80 amps available.
However, consider this:
(1) You can charge overnight at your destination. This obviates the need to plug in at the SC at or nearby the hotel before departing.
(2) You can reach a destination that is ~50+ miles away from the nearest Supercharger and charge there while you do your destination thing.
(3) You can plan a trip over a 300+ mile distance that is not on the SC highway. You can stop at a destination charger somewhere in the middle for 60-90 minutes, grab a bite or see a sight and add 50-75 miles to your battery and reach your next charging stop.
From personal experience:
Spent two nights at the Pfister Hotel in Milwaukee. That hotel has them. Charged overnight. Drove around Wisconsin the next day going to a brewery and a cheese factory. Returned, went to a ball game, plugged in overnight and left the following morning at 90%. Drove over back roads to the Mauston SC in northern Wisconsin.
Spent two nights in Phoenix. Hotel has destination chargers. Upon departure, charged overnight to 90%, then upon waking and packing the car, moved the slider to 100%. We departed about 90 minutes later for the Kingman Supercharger, and skipped Wickenburg.
I needed to drive from Boise to Winnemucca. Even with a range charge at Boise, a non-stop drive is touch-and-go, especially with the 65/70 MPH speed limits in Oregon and Nevada. The Say-When Casino at the Oregon/Nevada line has a destination charger (provided by others, not Tesla, but it makes no difference.) I stopped for about 45 minutes, slugged down a beer, won $4.40 on the slots, added 33 range miles and arrived in Winnemucca with 15 range miles remaining.
So, much depends on your travel plans. But I think for most of us, destination chargers are a blessing!