I understand, but wouldn't baptism serve to make you a member of a particular sect and thus unlikely to look at the beliefs of other sects? I think it would.
No more so than being raised in a church that practices adult baptism would.
A child raised in a Baptist church would be more likely to remain a baptist in adulthood; a child raised a Methodist is more likely to remain a Methodist. The fact the Methodist was baptised as an infant and the Baptist was not is likely to be the least relevant factor in future membership.
And, not being quite sure what you mean by sect (belief system or denomination), whether an Orthodox Presbyterian , for example, remains one or joins the PCA or the ARP will more likely turn on geographic availability rather than baptism.