The bulleted list below is ineffective; why does it not work?

When writing a professional message, the writer should always:

Keep the reader in mind and adapt the message

Use the 'you' attitude

End the message with a courteous close

Professional writing should always be correct, courteous, complete, clear, and credible

The list is not logically parallel.

The list is not grammatically parallel and doesn't always form a grammatical sentence.

The introduction $($the first line$)$ suggests that a list of actions will follow; instead, it presents a series of bullet$-$pointed items $($nouns$),$ not actions.

Some people in your audience may reject your advice