Beyond just ensuring that your resume looks like all the other resumes out there, templates are also generated as "one_size_fits_all" solutions. Do your career, your unique work experience, and your individual goals really fit in a one_size_fits_all format? For the vast majority of people, the answer will be no. Very few professionals have a completely linear, untarnished employment history. If there are any 'problems' in your background__such as a period of unemployment, too frequent job changes, a demotion, or any number of other challenges__a resume template will only accentuate and call attention to the negatives.
But, if a resume template isn't a smart choice, what is the solution? While it will take more time and effort, the solution is a custom resume that has been designed and formatted to highlight the pros in your employment background while modulating the possible negatives.