I have a successful career running a production company/freelance business and up until recently called myself a filmmaker too. Then one day I realized I almost never actually do films, and when I do it's definitely not for the money lol. I feel like my whole career I've tried to find something to call myself something that doesn't use the "V" word, videographer. Is it just me or does everyone else hate that word too? Just an odd thought.
Otherwise great article, my favorite is being willing to adapt, great quote from Future Shock.