There's a big difference: no one gives a shit about how authentic a resignation letter is. A thank you note, especially to a friend? Thoughtfulness and authenticity matter there. A lot.

And yet the greeting card industry with generic messages is $4.7 billion.

https://www.ibisworld.com/industry-statistics/market-size/gr...

Who the hell gets a greeting card and doesn't add their own handwritten note? Especially for something that actually matters?

What next? “I haven’t watch TV in 10 years. Who watches TV anymore?”