Do philosophers now agree that true knowledge comes from thinking and not from looking at things ?
Even very bright philosophers would be extremely unlikely to produce any good science just by thinking, even by thinking logically. You have to look at the world. For a statement to have a chance to be true of the real world, you have to start from whatever empirical data you have about it. Otherwise, your conclusion will just be wishful thinking.
Science progresses by being contradicted by the facts of the real world. Science has moved from Newton's false universal theory of gravitation to Einstein's still possibly false but much better General Relativity by being contradicted by the astronomers' careful observations of Mercury's position on its orbit around the sun.
Children grow up by looking at the world around them. The brain of a human being deprived from birth of sensory perceptions of the world would not mature to allow rational thought.
Animal species didn't need an acquaintance with quantum mechanics to survive, at least until now, so our natural perception of the world is good enough for us to survive, prosper and reproduce. This means that if we want to improve our understanding of nature, we have to look at the world more carefully than we need to in everyday life.