I believe that a positive LMO means that the employer is allowed to hire a foreign worker, they don't really check if you meet the job requirements.
My LMO was in the IT industry. The officer called me to the desk a few times during the process to ask me for some clarifications on the papers I gave her. Although I did have some experience on my resume, she gave me the impression that the degree was the most important proof I had cause she asked me several question about it.
So, I think that if the job requires a certain level of education that you have, there will be no problem.
But again, I didn't experience this exact situation so I'm not 100% sure.