Chapter 8.2: sentence sounds weird

[sam113101]

• I have searched open and closed issues and pull requests for duplicates, using these search terms:
  • string
  • slice
  • index
• I have checked the latest main branch to see if this has already been fixed, in this file:
  • https://github.com/rust-lang/book/blob/main/src/ch08-02-strings.md

URL to the section(s) of the book with this problem:
https://doc.rust-lang.org/book/ch08-02-strings.html#slicing-strings

Description of the problem:
The following sentence (in bold) sounds weird to me:

Indexing into a string is often a bad idea because it’s not clear what the return type of the string-indexing operation should be: a byte value, a character, a grapheme cluster, or a string slice. If you really need to use indices to create string slices, therefore, Rust asks you to be more specific.

Rather than indexing using [] with a single number, you can use [] with a range to create a string slice containing particular bytes:

Particularly, the word "therefore" feels out of place.

Suggested fix:

Therefore, if you really need to index a string, you will need to be more specific.