Assuming that I'm interpreting you correctly - neither do I believe that baptism "is a conduit for God to shovel his grace through." As a means of grace, it makes grace visible. I also like your statement that Baptists see baptism as a performance. So it is with infant baptism. It is a performance of God's grace being poured out on one who is totally undeserving of that grace. God doesn't have to "shovel" grace "through" anything. Grace is there.
I must be honest. I have a rather low view of baptism. I could never be a Baptist! I think that baptism - while potentially valuable - has been abused and distorted throughout the centuries and used primarily to create unnecessary divisions between Christians.
Sort of like selling white-washing of whatever's fenced? Enough to blanch the humble gods that are subtle compared to mortal ones ...
These thing make me wish to danse satyrs ... like serving literature rather that using it as a weapon to achieve something that wasn't intended aura Lee ... just another stage of the eternal thing-Y ...