There is a lot to check when playing a song.
I think those of us who learned to play music first through sheet music spend more time checking things like tempo, tone (brightly), key, and rhythm.
All musicians will check things like whether or not their instrument is in tune. Some people learn to hear this and don't need to use electronic tuners.
It's worth regularly checking my instruments and gear to ensure they're in good condition and especially with electronics, that they are safe to play. I don't want to discover that my cable is frayed and I've caused myself serious harm.
All this checking seems like a lot of work at first, but in little to no time, it becomes habit.
I meant to post this yesterday, of course, but I was feeling burnt out.
And that's how life's river flows today.