This shit again...
Reminds me of 4chan's /ic, where they seem to think that every great master used camera obscura and couldnt draw without it.
There's only a chance that Vermeer used it, due to the small size of his works.
Doesn't mean that everyone else did instead of painting all the fucking time and getting better.
And then today they project that onto every modern artist being photobashing and not being able to draw.
Sorry for the rant.
Side note, my father saw some of his works back when he was working in NY. Said that they aren't very impressive, their size contributing to that.