It’s because those planets are incredibly far away. The distance is so huge, there is no way to even picture it. It would be a single pixel on any telescope we

It’s because those planets are incredibly far away. The distance is so huge, there is no way to even picture it. It would be a single pixel on any telescope we could conceivably build. What we can do though is measure the chemical composition of their atmospheres. This could be very interesting if we found some hallmarks of life on a rocky planet.