I couldn't agree with OP more.
I was brought up in a strong Christian tradition (across two churches as there is a religious divide in my family) and attended a Christian boarding school. It was there during preparation for confirmation that I decided I did not believe.
I have been to a number of christenings now. One friend was mortally offended that I would not be a god-parent. Other friends have made me a 'non' godparent - I was mentioned at the service/ celebration but did not take any part in it save being physically present in the church.
Every time I sit through the Christening service I reconfirm my belief that I could not in all honesty, respecting those who have christian faith, stand up and make those devout and simple promises as I have no faith. I have no belief and no desire to help any child walk in the way of christ or to take their place in the worship of christ.
I feel similarly but less strongly about weddings.
I feel cross on behalf of friends who are practising and who moved into a popular CofE school catchment area and acquired a new church into the bargain who had to collect tokens from their new vicar before they could arrange a christening for their youngest son.
(For those who aren't familiar with the wording I have attached the baptism service responses for parents/ godparents below, taken from Common Worship)
^Parents and godparents, the Church receives these children with joy. Today we are trusting God for their growth in faith.
Will you pray for them,
draw them by your example into the community of faith
and walk with them in the way of Christ? ^
With the help of God, we will.
^In baptism these children begin their journey in faith. You speak for them today.
Will you care for them,
and help them to take their place
within the life and worship of Christ?s Church?^
With the help of God, we will.