Because we break up the biofilms, it doesnt' mean that the immune system can handle getting rid of the bacteria. Lyme is known to suppress the immune system, which is why we can't beat this disease on our own. Some can get Lyme and their immune systems can keep it dormant - others can for a while until some major stressors happen in their lives and then the Lyme bacteria can come out in full force and take over. Others -for varying reasons - will have a compromised immune system and can't fight off the bacteria at all and get ill immediately.
So just taking these enzymes alone isn't enough to kill the bacteria, it only breaks up the biofilm in which they can hide from the treatments.
By the way, I take bromelian.