The purpose of a public library (at least in the US) is to provide services to the public. A large part of the public, especially who aren't otherwise occupied during the day, are young children.
Most libraries I've been to have a large section dedicated to kids books and activities, often with stuff animals, blocks, etc that kids can use for creative play.
There are usually also rooms that you can reserve for work or study, and tables out in the open that people can sit at to read or work.
Kids are loud and energetic. Usually older people enjoy the vitality they bring to a space. The main age group bothered by them are 20 and 30 somethings who don't have kids and aren't used to being around them.
Most libraries I've been to have a large section dedicated to kids books and activities, often with stuff animals, blocks, etc that kids can use for creative play.
There are usually also rooms that you can reserve for work or study, and tables out in the open that people can sit at to read or work.
Kids are loud and energetic. Usually older people enjoy the vitality they bring to a space. The main age group bothered by them are 20 and 30 somethings who don't have kids and aren't used to being around them.