Socrates once said that ethics, in condensed form, is no more than the expansion of the 'know thyself' maxim. So, if you truly understand yourself and know all that you can be, you'll come to terms with your nature and therefore will be devoid of inner conflict. Then you will necessarily be good. So, this is more akin to saying that man is actually good by nature if he really is in tune with his nature. The more out of tune he is, the more evil he will be, as the greater the dissonance, the more negative energy he will exude onto the outer world.
From an extroverted perspective, yes, seems like you're thinking that important is tantamount to what benefits society. Ok, in that case, I agree that they are both important, but what good could implementors be if noone came up with ideas to be implemented to begin with? Spinoza and Milton may have influenced millions indirectly, through authorship and second hand authorship. They changed many lives because people have understood their ideas and incorporated them into their lifestyles. Implementors, at best could provide you with an external environment where it would be easier for you to access and implement those ideas. Indeed, the men of ideas are more instrumental at pushing the human race forward than men of affairs.