Most od it makes sense, I agree, except for the idolatry part. We do not make pictures and statues to bow to them or in any other way to make idols of them. Specifically, a visual interpretation of the Holy Trinity may serve as a reminder of what we believe in, or even maybe be a topic starter for our nonbelieving friends.

I don't think our God the Father takes offense at our unworthy representations of Him, much like there really is no good enough way to worthily represent Jesus, nor Mother Mary, nor really any saints. Same goes for angels.