Point of order it is science and it works something like this - When steel comes into contact with aluminium there is a risk of electron transfer which causes the two metals to weld together. The risk increases over time and with higher torque settings, contaminated assemblies, distortion of threads, ingress of moisture and contaminates etc.
The idea of using a thread lock adhesive such as Loctite 243 is two fold. Firstly it bonds the threads together achieving a greater break away strength for a lower torque setting and less compression. Secondly it provides insulation between the steel and aluminium. All of which reduces the risk of electron transfer and the welding together of the two metals.