I agree with you, but now that I'm searching for a job, I'm seeing a lot of integration with linkedin where you can apply by clicking just one button, what is better than complete a huge form for every job offer.
That is either sarcasm which needs to be marked, or you are in trouble. "[B]y clicking just one button [you can] complete a huge form for every job offer" is the definition of how to produce spam.
All "how to write an effective job application" articles emphasize writing cover letters/emails that show you've read and understood the job requirements and demonstrate how you can fill the position, including a resume with applicable information.
Yes, but tools such as Taleo does not help the user, as it is likely the user will be typing the same information many times. This free the user to write better cover letters and emails.
Thinking from a HR perspective, maybe linkedin API can help automate the search for a fit and avoid spams. Spams may occurs because they don't have the right tools.
All "how to write an effective job application" articles emphasize writing cover letters/emails that show you've read and understood the job requirements and demonstrate how you can fill the position, including a resume with applicable information.