Can it be argued that each person has all kinds of memory developed equally well?

This statement is erroneous, since usually a person determines the predominance of some kind of memory in connection with his activity. By the nature of mental activity, memory can be divided into:
• motor memory (motor) – various movements are remembered, saved and reproduced (well developed, for example, among ballet dancers);
• figurative memory – images, sounds, smells are remembered, saved and reproduced (by musicians, opera singers, for example, other creative people);
• emotional memory – emotions and feelings are remembered, saved and reproduced, emotions are remembered not by themselves, but together with the phenomena and objects that they cause (for example, artists and emotional people);
• verbal and logical – thoughts are remembered, saved and reproduced, this is the leading memory in humans, the most difficult (in mental workers).
Also, memory can also be visual and auditory. It depends on which of the analyzers perceives information better.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.