> Anyone applying for a job should be doing this with their cover letters

Sadly people lost the skill to write a standard form concise 3-paragraphs-of-3-sentences cover letter even before keyword-based ATS initiated the beginning of the end. It wasn’t supposed to be a summary of a CV and an essay about your lifelong passion for automated ad-bidding quality checks or some other shit employers delude themselves into believing someone might organically be really into.