As a recovering theoretical physicist, things like this which is primarily an attitude are tiresome. I'll even go further down the line, just because you can wr

As a recovering theoretical physicist, things like this which is primarily an attitude are tiresome. I'll even go further down the line, just because you can write down the "equations of motion" often doesn't give you anything but another starting point. I will always be amused when people who study particle physics do everything after 2nd quantization and thus assume that literally understanding plane wave interactions explain all physics, rather than such methods are actually reductionist and have their own attendant assumptions that fail at certain points (like the UV limit for QED), but that means you really don't "understand" all physics just by writing down the Lagrangian for SM, it's just a starting point. "Understand" for a scientist shouldn't be abstract, it should be "given x equations/model I can predict y output" which is very hard for a lot of physics, otherwise there wouldn't millions of scientists doing things other that just doing string theory derivations everyday. Equations of motion is not understanding.