Why is it important to neglect writing your cover letter

According to WriteExpress.com you should not neglect writing a cover letter. I, infact, agree. Check out the website and review the infor: Here is some of what they say below:

A potential employer's first impression of you is your cover letter. Your cover letter introduces you and your resume. The stark reality is your resume may never be read without its being accompanied by a professional cover letter. Without a resume cover letter, you might never receive a callback. Here are two things to remember:

Your resume cover letter is a sales letter. It sells your resume; therefore it sells you. A common mistake made by job hunters is either neglecting a cover letter with their resume or writing a poor cover letter.

since it can be assumed that what aslam is making is a template by compiling all the commonly used excel formatting in several worksheets in an excel document, aslam can choose to save it using the .xltx or .xltm format instead. thus, aslam can distribute the templates he has made to his team members in an easier manner.

(because i need 20 chars)