Galvanic Reaction

Last year I had a pipe burst in the lab of my office and it forced me to shut down for 9 weeks while the facility was restored. After a review of the scene the insurance company determined that the source of the break was a galvanic reaction resulting from a copper pipe being fitted to a stainless steel coupling. This got me to thinking about “why” do we allow aluminum and/or steel components to be attached to our implant fixtures given the fact that galvanic reactions from dissimilar metals is clearly a real thing. We seem to have a fairly good understanding, or at least a healthy fear, of such as it relates to touching an implant surface with an instrument yet we continue to place components of dissimilar metal on top of these devices without any fear. This makes no sense to me and I am hoping for some clarification from someone who understands the science better than me!!! I can assure you that a galvanic reaction can do at least 90K worth of damage to a dental office though I am not sure, given the dissimilar metals that make up cover screws, fixture mounts, healing abutments, and final components as well as the tools we use to secure components with, if the problem even really exists with titanium implant fixtures.