If you consider electron (any particle), it is understood by Dirac equations.
We understand all of its known properties.
But we have no idea what are electrons (actaually any partticle or bosons) made up of.
Albert Einstein once said:
"All these fifty years of conscious brooding have brought me no nearer to the answer to the question, 'What are light quanta?' Nowadays every Tom, Dick and Harry thinks he knows it, but he is mistaken. (Albert Einstein, 1954)" .
Is it not important for us to understand what are fermions and bosons made up of instead of just naming them and writing its properties?
Regards,
Bhushan Poojary