The show's premise is about using science and creativity for good, not for causing harm. MacGyver's skills are focused on using his knowledge to help people, not to hurt them.
The idea of MacGyver making a bomb is a misconception, likely fueled by the fact that he often uses unconventional materials to create devices. However, these devices are always designed to help him achieve a positive outcome.
It's important to remember that creating explosives is dangerous and illegal. If you are interested in learning about science and engineering, there are many safe and ethical ways to do so.