The problem
The business model canvas is a strategic planning tool that works best with a team, a marker, and a big surface. The nine building blocks force the team to confront every part of the business simultaneously — you can see how the Key Activities connect to the Value Propositions, and how the Cost Structure relates to Revenue Streams, all on the same surface.
The challenge is that the BMC is a working tool, not a finished document. Teams fill it in, revise it, cross things out, and reach conclusions that live only in the conversation around the board. The final board is dense with information in nine different handwriting styles. It's not ready to hand to an investor or share with a new team member.
Transforming the BMC into a readable document is a multi-hour job. Somebody has to decipher the handwriting, organize the content of each box into readable prose, and capture the strategic logic that connected the boxes. That person is usually the CEO, who has other things to do.