No, you do not understand why there even is such a thing as a conditional baptism - and it is not "any baptism to which a condition is attached".
Once you understand why the Church permits conditional baptisms but only under extremely strict circuмstances, you will know why it's not simply "any baptism to which a condition is attached".
Care should be taken that every fetus born prematurely, no matter at what stage of pregnancy, be baptized absolutely; conditionally, if life is doubtful.
Canon Law itself states that if life is doubtful, then the baptism must be conditional. You are wrong.
A Conditional Baptism (or Confirmation or Holy Orders) is administered when the previous sacrament is doubtful because, we cannot re-baptize (or re-Confirm or re-Ordain) because to do so is a sacrilege. Do you get that?
Since in such cases it is not possible to know for sure, in order to avoid committing sacrilege, the words: "if thou art not yet baptized, I baptize thee in the......" are said.
In the case of miscarriage, you already know the baby was never baptized so you do not baptize conditionally, you baptize using the usual form. If the baby is dead, you are simply baptizing a dead baby, but there is no risk of committing sacrilege.
By virtue of the Church's own teaching, Canon Law's "conditionally" can only mean you are baptizing based on your hope that the baby is alive. But there is no such formula for conditional baptism that says "in case thou art alive, I baptize you....."