Batman clearly does a lot of research and development (apparently on his own in many timelines). The question has been posed before.
Yes, Batman is a scientist. But not all scientists are Batman. (Sorry, Homer.)
- Genius-Level Intellect: Batman is a brilliant, virtually peerless, detective, strategist, scientist, tactician, and commander; he is widely regarded as one of the keenest analytical minds on the planet. Given his lack of superpowers, he often uses cunning and planning to outwit his foes, rather than simply "out-fighting" them. [emphasis added]
The bottom left cell reads:
As the years pass Bruce Wayne prepares himself for his career. He becomes a master scientist.