A similar argument I hear is “If they want me, they will find and arrest me no matter my precautions”.

Kinda yes… But why are you talking about threat models that include someone deliberately hunting you down? We are not high-ranking dissidents or criminals that they would put effort and money into finding. Our concern is passive surveillance - maybe the collected info doing us a disservice (like being leaked for scammers or sold to an evil ex), maybe even something mundane getting flagged and us being arrested just to serve as an example.