Understood.
Speaking as an (Eastern) Orthodox Christian, I would state that it is the Church that Christ left to us and not "the Bible" (τὰ βιβλία - a term coined, I believe, by Archbishop John Chrysostom in the 4th century) and that the New Testament (and arguably, to some extent, even the Old) came out of the Church and not vice versa. Would you disagree with this view?
This does not mean, however, that the Church's practices and beliefs should be contrary to what has been witnessed to by the Church previously in Holy Scripture. Scripture is a rule of sorts in this regard (the Greek word used would be "canon"). I think you are arguing that Scripture clearly states that infant baptism is not "Biblical" (or, if you will, "canonical"). What in Scripture, to your mind, makes this clear?
Thank you in advance for your reading my response.