No of course you can't baptize every HEALTHY infant, no one is saying you should! but what about a dying newborn? Would the baptism be valid? I would think it a sin not to baptize that baby. In many circuмstances every second counts. It's literally do or die. What are the consequences of NOT baptizing in those circuмstances? This puts a lot of pressure on the person trying to make that decision in a dire situation.What does properly disposed mean when facing the impending death of a child?
Also, why DOES the Church acknowledge the validity of baptisms from most other protestant sects when they know the person/ infant/parents are not properly disposed ?
Of course the baptism would be valid for a dying newborn, just the same as it would be valid for any healthy person - and yes, an infant whose death is certainly imminent, can be baptized by anyone and should be baptized without delay. Should that child live, the parents are responsible to raise the child a Catholic.
Regardless of whatever false religion it happens, all baptisms done properly are valid, but adults who receive it outside of the Church as if it is nothing more than a type of initiation, commit a sacrilege and are in sin immediately after they are baptized - because not only did they receive the sacrament with an improper disposition, they received it for the wrong reason altogether.
In a nutshell, for those baptized outside the Church, if they had known the Church's actual requirements for the reception of the sacrament, they would have never desired or wanted to be baptized at all.
The sacraments belong exclusively to the Church, the Church is the *only* guardian and protector of the sacraments, as such, She makes the rules. You want Her sacrament? - then you must be Catholic, *that's* the foundational rule and it applies to all of the seven sacraments all of the time.