Not sure if it is us or them, so to speak. [perhaps we are obtuse, only seeing certain things. On the other hand, I think certain trees/plants may have on/off years, one year spectacular, in terms of flowering or bearing fruit, the next year, not so much.]
This tree in particular was impressive this year. Before it really bloomed, the flower buds were a dark pink color. The whole thing got lighter once the flowers opened up. If you look carefully at the photo below, you'll notice the slight color difference between the fully opened petals and the ones that are still more in bud stage.
Then, oddly, it was only in real full bloom for a very short while. Luckily I managed to get a few decent photos at the time.