While I agree that finding coding work as a CPC-A can be challenging, it is not impossible. Additionally, if you actually want to work as a coder, almost all employers require certification, whether through AAPC or AHIMA. It is required at my employer. Almost all experienced coders and hiring managers recommend the same things to new CPC-As. 1) Get your foot in the door with any position at a company that employs coders. Don't only consider a coding position. 2) Get your -A removed by working as a biller, authorization specialist, etc. 3) Network at your employer and outside your employer. 4) Make sure your cover letter and resume are spot on. Have a few customized for the different types of positions you are applying for. 5) Practice your interview skills.
If you believe that after passing your exam, with no coding experience, that you will make mid-high 5 figures and work remotely, then yes, it is useless.
Coding is not for everyone. I personally do a variety of tasks at my job and coding is only 1 of them. As much as I enjoy coding, I would not want to code 40 hours per week. If your goal is be coding for any portion of your job, then certification will be required.