They are, but the foreground is only a projection of what is real, just as the character is only a projection of the actor behind the mask. The foreground is just One Big Act, expertly executed. But if the actor himself is taken in by his own performance, believing he is actually the character being played, then there are consequences.
The Buddha's First Noble Truth, that life is suffering, was his first observation as to the nature of the foreground.
Shunryu Suzuki, Zen Master, puts it this way:
"To live in the realm of Buddha Nature means to die as a small being, moment after moment. When we lose our balance we die, and at the same time, to lose our balance, sometimes, means to develop ourselves, or to grow. If we are in perfect balance we cannot live as a small being. So whatever we see, things are changing, losing their balance. Why everything looks beautiful is because it is something out of balance, but it's background is always in perfect harmony and on this perfect harmony everything exists, losing its balance. This is how everything exists in the realm of big Buddha Nature. So if you see things without knowing, without realizing Buddha Nature, [only the foreground] everything is in the form of suffering. But if you understand the background of everything, which looks like suffering, suffering itself is how we live, how we extend our life."