It is not necessary to let your cats go outside daily. Even though they are eager to go outside all the time, you must consider several factors before allowing them to do so.
Take note that a cat's behaviour can change if she stays outdoors all the time. With the opportunity to go outside, cats are less likely to develop behaviour problems like having a messy litter box, and they may show less hostile or violent behaviour toward others too.
However, risks like illness or diseases that can be acquired outside are huge. There is also the possibility of getting infected with parasites, fleas, and acquiring viruses. The environment also has an impact on their safety. Another possibility is ingesting toxic chemicals and antifreeze poison. Outdoor cats are exposed to more dangers than indoor cats, and their life expectancy is greatly reduced.