What symphony musicians play is what the composer wrote as he wrote it to be played and their sheet music reflects this. You only deviate from what the composer wrote if you want to do your own arrangement; then you make it clear it is your own arrangement. So for Classical music (which I think is what you are talking about here), you need to put any blame you have on the world's most beloved composers such as Beethoven, and Mahler and Rachmaninoff, etc. Same with anything by Horner or Morricone who are more modern-day orchestral composers... You play what they wrote as written or the public will want their money back and you lose your reputation. As a matter of fact, a musician in an orchestra cannot play something in their own style or else they would stand out. All the people playing each type of instrument must play at the same level of sound. And if it's a string instrument (cello, viola, violin) they must all bow in the same direction as a group so no one stands out.
Soloists sometimes have their own style if they play outside of a symphony and not just a solo part IN a symphonic piece. That is where the "artist" component comes into play. Even so, if they say they are going to play X by Beethoven, they'd better play it the way he wrote it unless they specify it is their own rendition.
I can understand some people not liking this type of music and preferring other styles. But Classical is the most difficult to play and lays the foundation from which all the other styles develop as it embodies all the technical skills the other styles use to any degree. That is one reason why symphony lovers attend symphonies--to not just hear the music but watch with what execution it is performed. And this is why most students of music learn Classical first. Many Classical pieces were written as pieces to teach how to do certain techniques. Bach did this a lot with the more common pieces you hear.
If you want "manly," try John Philip Sousa's marches or the 1812 Overture. There's plenty more after that.
Playing music to praise God goes all the way back to the psalms where David wrote about praising God with the lute and the harp and probably earlier than that. Bach wrote all his music "for the glory of God." Are you familiar with his organ works? He certainly was "manly." Mozart and Chopin were Catholic.
I'm now playing "Santa Maria Mater Dei" by Mozart on the violin. It has taken me years to be able to do this and it still needs much more work. It's a prayer dedicating oneself to Our Lady. Absolutely exquisite! To hear a symphonic orchestra play this--oh!!! It's my way of thanking Her for giving birth to our Savior. (lyrics below) Have a listen--it's on YouTube.
Have you ever heard Bach's Christmas Oratorio? It is well worth the listen. Also on YouTube. What joy is expressed even at the very beginning--a Savior is born!!!! Trumpets express mankind's joy! You cannot listen to that and remain unmoved. It raises your soul to God.
Learning to play music is no waste of time for me. It's a constant reminder of my need for God's grace in order to do it well. It can be very humbling. I even dedicate my practice time to God. I'd be thrilled to be in an orchestra playing for Him. I'm simply using the GIFT He has given me, the gift I feel so much drawn to use. To ignore it would be to ignore part of His Will for me. Trust me -- it IS a gift. I can't draw or paint but I can sing and play by His grace only. It is a perfect way to still the soul before praying. Music can express what's in the heart much better than words in any language.
Lyrics in English (it is sung in Latin):
Holy Mary, Mother of God
I owe everything to you,
and from this moment I devote myself
uniquely to your service.
I choose you as protector,
you as preserver.
In my heart forever will be
your honor and worship,
which I will never forsake,
nor allow anyone subject me
to violate by word or deed.
Holy Mary, gracious,
receive me, suppliant at your feet:
protect me in life,
and at death's assize be my advocate.
Amen.