'Just because you don't see them doesn't mean that they are not there'.

Just because you don't see them, it doesn't mean that they are not there," said Ms Heng. "If rabbits are abandoned, they will hide first because they are prey animals. They only come out twice - in the early morning when they search for food and in the late evening. These are the two timings we go out to rescue them."
Read more at https://www.channelnewsasia.com/news/singapore/groups-fighting-to-save-abandoned-abused-rabbits-10577208

I would replace the bold part with 'Just because you don't see them doesn't mean that they are not there'. Isn't it for the better?

Thanks.