This happens with ALL hobbies.
But to answer your question.....for the SAME reason guitar players will listen, for 20 minutes, to Jimmy Page talk about what strings he used, or what tubes, or what amp, or what pedal, or how much Heroin he used.
Once a Photographer, Musician, Athlete, becomes "famous". the most mundane things often become of great interest to their Fans/Admirers.
It just kind of follows. Everybody wants to know what Superman's cape is made of, even though, if they had it, they could still not fly like him.
You could make a book of 70 excellent photographs from most anybody on this forum. They are just pictures for F sake, not magic.Then that book s what is focused on.
Not all of their crappy photos, or all their lousy prints, or that they cheated on their wife with a 16 year old, or they abused their daughter, or cheated on their taxes, or were impossible to live with, or drove drunk, or never gave a dime to charity.
Fame (tends to) raises a person above scrutiny.
How many times have you heard the phrase.....Separate the art from the artist.
What for.?
They would not do the same for you or me.
I am NOT saying Lee was bad in any way. He might have been a peach of a guy.
I am simply pointing out how fame (often) changes "everything".
Look at a site like Yahoo for example. MILLIONS of people are dying to know what car somebody (famous) bought, or what their girlfriend bought them for Valentines day, or who cuts their stupid hair.
Fame elevates people into the realm of Great Interest.!