How many photos of white inventors have the word "white" near them, though? Image search isn't exactly parsing biographies. So it gets largely lost in noise compared to "inventor".

It's pretty common for certain words in certain image searches to be useless, and that's including a lot of very boring searches nobody has ever thought of.

It's pretty easily explained by the fact that people really only use the term "white inventors" when talking about black inventors (honestly "white inventors" would probably have racist connotations in most other contexts).