Theoretical Physics - it is cool. Especially elementary particle physics. Especially Quantum Field Theory. It uses renormalizations of constants, which is out of comprehension to most layman people. You know why? Because theorists first write their Lagrangian for, say, electrons and photons and later on declare it
not to be for electrons and photons. So if you are a layman, you just suck at this moment.
They say - it was in fact written for "bare particles". You see, theorists know something experimentally unknown. Theorists say: in order to get the electron-photon Lagrangian we must carry out the fundamental constant renormalizations. Tricky is that QFT, but clever are the theorists!