the mind = writer’s mind
In the mind understanding,

Albert Einstein is a scientist of physic, or more than that
Buddha is a scientist of mind and happiness, or more than that

Albert Einstein found the law of energy-mass equivalence, E = mc ^ 2
Buddha found the law of happiness, Law of Cause and Effect

Many did not say anything about Buddha Gautama,
Many said : Buddha’s inventions are very related to science

Analogically, it’s like saying Albert Einstein inventions are very related to science,
when indeed, the inventions are science.
it’s like saying Buddha Gautama inventions are very related to science,
when indeed, the inventions are science too.