I might be asking a question that has an opinionated answer but all opinions matter.
I was thinking on developing a cluster visualisation framework, but then I always wanted to know for a data scientist does visualisation matter more than number when it comes to cluster unless of course he/she wants to validate their algorithm. I have always wanted to visualise the data rather than looking at the number (could be Numerophobia, not). Is there any paper in psychology or data science that would give any reason for human perception more towards visually pleasing (the data) than plain old numbers?