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.
Whichever path you select for the creation of your resume, it is almost always in your best interest to veer away from template resumes. While it may seem like a large investment of time (and money if you hire a professional to help you), the returns from creating a one_of_a_kind resume will be more than worth it when you land your dream job at a great salary.