Recording a song is like getting yourself dressed up for a special occasion. A wedding or a posh meal perhaps. Everything has to polished and proper. You are going to be seen. Photo's will be taken. People may even look at those photos in the future.
Do not go to these events with a dodgy hair-do!
On the other hand, singing live at a Homesong is more like a bowl of rice and chilli while you're slouched out on the couch. All about the fantastic taste and the moment. There may well be the odd splotch of sauce that misses your mouth.
But, unlike the chilli, you can chill.