Yes, the availability of a children's room might have been a factor. Maybe if that was the case there might have been a nearby parish were there was such a facility?
The idea that this is par for the course for all Catholic parishes is just wrong. The church simply does not exclude those who do not fit it through a cause they cannot control themselves. The vast majority of parishes would make absolutely everyone welcome. Mine does a 9 o'clock children's Mass, with a children's choir, children doing the readings and intercessions, bringing up the gifts, and gathering around the altar for a child oriented sermon that is often hilarious as the priests often ask questions and the children put up their hands to give unwittingly funny answers.
My own parish has a cry room, hearing aids, space reserved in the first pews for people who can't get up to walk to Communion for reasons of age, illness or disability (the priest and the Eucharistic go along the pew with the bread and wine) and more spaces for wheelchairs. The parish has spent a lot of money modifying a door for wheelchair access and building a ramp. A local community for SN adults attends a certain Mass every Sunday. They all sit in the first pews. It's a well off parish and very active in the social justice field, but it is not alone in the sort of efforts it makes and certainly not in its attitude.
The church fills to overflowing at Christmas and Easter with people who have clearly never been before or haven't been for years -- packed to the outside doors, with the cry room and the sides of the altar lined with fold up chairs to accommodate all comers. Ushers direct the various seated sections at communion time or there would be mayhem. People do not get quizzed as to their motives or background if they go to communion. At the end of all the Masses the priest invites everyone to return, mentions the fact that the adult religious ed phone number is on the first page of the church bulletin, available at the door, and thanks them for their participation in the worship of God. There are many adult baptisms every year so maybe some take up the invitation.