1. A logo doesn’t need to say what a company does
Restaurant logos don’t need to show food, dentist logos don’t need to show teeth, furniture store logos don’t need to show furniture. Just because it’s relevant, doesn’t mean you can’t do better. The Mercedes logo isn’t a car. The Virgin Atlantic logo isn’t an aeroplane. The Apple logo isn’t a computer. Etc. Etc.
2. Not every logo needs a symbol
Sometimes a client just needs a professional wordmark to identify their business.
3. A simple logo aids recognition
Keeping the design simple allows for flexibility in size. Ideally, your design should work at a minimum of around one inch without loss of detail. Look at the logos of large corporations like Mitsubishi, Samsung, FedEx, BBC etc. Their logos look simple and are easier to recognise because of it.
One thing to remember
All strong logos have one single feature to help them stand out.
Not two, three, or four.