Whoah. Try using that reasoning on your engineering professor!
“Why should I make the data available to you”
Many years ago had to review some work done at a Superfund site. The consultant made the same argument - he was a “Professional”, and it was only the results that mattered based on his interpretation of the data. Not the data itself.
When he was finally forced to give up the data it became obvious why he argued the fact. Sparse data, sometimes written in a field book, but more often than not on some random scrap of paper (including the backs of fast-food receipts and the paper sacks!) did not really instill confidence in the data. Or the consultant.