Yeah, I mean, you can go the opposite way and be so perfectly aligned to a grid that it sounds inhuman, like it's all quantized. And some recordings really benefit from not having a click track to keep people locked on a grid. The looseness can be part of what makes the song.
That said, I think most beginners would benefit from more practice on timing. Better to be tight and capable of looseness vs just being sloppy and incapable of tightness. I still practice alternate picking against a metronome (or just my foot tapping) playing 8th notes, triplets and 16th notes at various tempos. Finger style, too.
One and, two and, three and...
Trip-L-It, Trip-L-It, Trip-L-It...
Wa-ter-mel-on, wa-ter-mel-on, wa-ter-mel-on...
And practice placing emphasis at different syllables. "WAT er mel on", then "wat ER mel on", then "wat er MEL on" and "wat er mel ON". Muting the un-emphasized notes. It get's your playing tight.