LightBurn, like many other cross platform applications, uses the Qt framework. Specifically we utilize the pre-built libraries provided by the Qt project. While it’s technically possible to do what you are asking it would require recompiling the entire Qt framework and statically linking the MSVC libraries. Technically possible but rarely done from what I can tell. Also, using the provided libraries allows us to rely on community vetted builds instead of those we built ourselves which may or may not be as stable.
On most people’s systems the vcredist packages are already installed because of other programs and you’ll never even see the install happen. The only reason you did is because you obviously don’t have it installed already 
LightBurn will work just as fine on most major linux distributions so that’s perfectly fine if you would prefer to avoid installing MSVC.