Option to change default comments to "Comment Internally"

Right now, in the comment section, "Share with customer" is the default selection in blue.
It would be good to have an option where "Comment Internally" is highlighted in blue so that the users do not press "Share with customer" accidentally.

Although the user has the option to select either when making the comments, the tendency is to select the highlighted option always. So, if the administrator has this option to highlight the required option, it would avoid accidental clicks on the wrong option.