Maybe that's because scientists see no evidence of intelligent design anywhere in nature. Everywhere is chaos and randomness, exactly what you would expect if the universe were composed of blind and impersonal forces operating with no rhyme or reason or intelligence behind them.

The only departure from this meaningless pattern are the laws of physics themselves, which are rules which tell us how matter, energy, space and time interact, with great precision, but no plan or purpose. They are the bookeeping rules that make the universe work in a predictable and reasonable fashion. If there is a God, we should search for him as the architect of those laws. He created the universe so perfectly at the beginning that it runs itself without any further interference from him. In other words, there is a reason for everything, but a purpose to nothing.

These physical laws don't seem to be concerned with our lives or our deaths, our place in the cosmos, or our reasons for existence. They are more concerned with things like electricity and gravity and light. But they are real and they are measurable and they are understandable. We can set up experiments and ask questions and talk about them in meaningful ways. They make sense, but they know not us.

Think of it this way, the laws of gravity tell us exactly how a rock dropped from a building will speed up as it falls to the ground. The same laws also tell us exactly how the planets travel in their orbits around the sun. But they don't tell us why the rock or the planets are moving. Those are different kinds of questions.. The Colorado River and the Grand Canyon exist because water flows down hill, not because Southern California needs water.

Scientists don't find the the idea of intelligent design repulsive, they just find it unnecessary. There are easier explanations for why the presents wound up under the tree than just saying there has to be a Santa to put them there.

Maybe there is a god, any maybe he cares about us, and maybe he created the universe we live in. But he also created the universe so it can be understood by human reason. We don't need to invoke him as an excuse for everything we don't understand right away. We should save him for those really important questions we can't ever hope to understand.