I don’t think you are necessarily “wasting” your time, however, I think you have added needless hurdles. The first thing that comes to mind is will an ambulance company’s insurance insure you? As far as joining an ambulance service, this will be the deal breaker for you. However, there are other jobs requiring an EMT certification, so in that sense, it would not be a waste of time.
Any obstacle can be overcome if you work to overcome it. But, you will never overcome them if you listen to sanctimonious individuals advising you based on their prejudices instead of facts. The facts lay in the circumstances and a potential employer’s willingness to offer forgiveness, giving you a shot.
Good luck!
Thank you for the advice I appreciate it.