A Busuu example dialogue suggests that this phrase ギターが弾けると良いのですが means "It's better if you can play the guitar".
I understand that ギターが弾けると means "if you can play the guitar". Is this the explanatory の in this phrase? What purpose does it serve? Does it make 良い mean "better" rather than just "good"?
Also, is this a typical way to express that "something is better/preferred" in familiar language? I would have just said ギターが弾けるの方がいいです...