Good post, Fionn.
The short answer is yes. Maybe better bass but certainly better musician. At the age of ten I was packed off to boarding school wher I started in the Chichester cathedral choir. My dad was no fool because it meant I had a good education on a choral scholarship (50% discount). We rehearsed and sang at least one choral service six days a week with one day off. That day we would go on all sorts of expeditions, swimming in the sea in summer and crawling under the Goodwood motor circuit fencing. And we received a bloody good education.
But to get back to the music. Being immersed in that stuff you couldn’t fail to have a good ear for all parts of the harmony and without trying I became an ace reader. A bit like learning to speak by hearing talk all round you. I left a fair bit before Leonard Bernstein came to conduct the premiere of the Chichester Psalms but we went to sing the hymns at the British Legion Festival of Remembrance. I can fairly claim that the first stage I performed on was at the Royal Albert Hall. To stand on that stage in the silence while all the poppies rained down was an emotional experience, even for a twelve year old not long after the end of WW2.
Several of my contempories went on to glittering musical careers. I just play the double bass.