And, that can be the case, as far as it goes...
But, we have been on the ride countless times.
Many times, first-thing in the day...
And dozens of times at other different and various times of day.
11:00AM, 12:30, 1:15, 2:30, 3:00, 4:00PM, and such.
Each and every time, the experience is different and we've seen unique animal combinations and various stages of movement from them.
I agree that daytime would be a better time to see more animals, but proffering "Best time to go is still first thing in the morning" has just not been our experience, and we have had a lot of that.
We are happy to ride it later in the day (still daylight) as we never know just what we might see
that is memorable on that particular trip.