To reiterate most of the points made by Ctesiphon, the other sciences like biology and chemistry tend not to be as widely employable as physics. Physics is very mathematically intensive, and although there is certainly some math in biology and chemistry, and particularly in upper level chemistry, it’s not as mathematically intensive as physics. A lot of the math in chemistry is more along the lines of repeated use of defined formulas (that were mostly discovered/invented by physicists). These majors don’t foster problem solving and critical thinking skills in quite the same way as physics.
If one wishes to work in physics, one essentially has to obtain at least a masters, and one must have a PhD if one wishes to do real research in physics. These jobs are often filled with physics majors because there aren’t any jobs available in physics to a person with a bachelor’s degree.
Do you have any kind of interest in actually working in physics, chemistry, or biology? If these are fields that you’re already interested in purely for their own merits, then that alone is a good reason to pick one of them as a major. The relatively wider range of employability is an added bonus or ‘comfort zone’ for a student in one of these majors.