The point of point 10 is that overusing words like ‘like’ or choosing simple, possibly-inexact words can cause problems. In particular, it can cause writing to stray from being about the idea to being about the interaction with the idea (see point 9), it can set the wrong kind of vibe (communicate the wrong emotive thought to the reader), and it can occasionally obscure the logical content. I think using ‘like’ and deliberately simplified language is great when one is thinking through one’s ideas, but I think it often makes writing less sharp (less bell-like, if that simile resonates).
The point of point 10 is that overusing words like ‘like’ or choosing simple, possibly-inexact words can cause problems. In particular, it can cause writing to stray from being about the idea to being about the interaction with the idea (see point 9), it can set the wrong kind of vibe (communicate the wrong emotive thought to the reader), and it can occasionally obscure the logical content. I think using ‘like’ and deliberately simplified language is great when one is thinking through one’s ideas, but I think it often makes writing less sharp (less bell-like, if that simile resonates).