Philosophers...unmanly, avoiding the business of the city and marketplace

Aulus Gellius addressed the role of philosophy in life.

"Philosophy, Socrates, is indeed a nice thing, if one pursue it in youth with moderation; but if one occupy oneself with it longer than is proper, it is a corrupter of men. For even if a man be well endowed by nature and follow philosophy when past his youth, he must necessarily be ignorant of all those things in which a man ought to be versed if he is to be honourable, good and of high repute. For such men are ignorant both of the laws relating to the city, and of the language which it is necessary to use in the intercourse of human society, both privately and publicly, and of the pleasures and desires of human life; in brief, they are wholly unacquainted with manners. Accordingly, when they engage in any private or public business, they become a laughing-stock; just exactly as statesmen, I suppose, become ridiculous when they enter into your debates and discussions ... to be a philosopher is not dishonourable when one is young; but when one who is already older persists in the business, the thing becomes laughable, Socrates, and I for my part feel the same towards those who philosophize as towards those who lisp and play. Whenever I see a little boy, to whom it is fitting to speak thus, lisping and playing, I am pleased, and it seems to me becoming and liberal and suited to the age of childhood; but when I hear a small boy speaking with precision, it seems to me to be a disagreeable thing; it wounds my ears and appears to be something befitting a slave. When, however, one hears a man lisping, or sees him playing, it appears ridiculous, unmanly and deserving of stripes. I feel just the same way towards the philosophers When I see philosophy in a young man, I rejoice; it seems to me fitting, and I think that the young man in question is ingenuous; that he who does not study philosophy is not ingenuous and will never himself be worthy of anything noble or generous. But when I see an older man still philosophizing and not giving it up, such a man, Socrates, seems to me to deserve stripes. For, as I have just said, it is possible for such a man, even though naturally well endowed, to become unmanly, avoiding the business of the city and the marketplace, where, as the poet says, men become “most eminent,” and living the rest of his life in hiding with young men, whispering in a corner with three or four of them, but never accomplishing anything liberal, great or satisfactory...He does not, of course, refer to that philosophy which is the teacher of all the virtues, which excels in the discharge of public and private duties alike, and which, if nothing prevents, governs cities and the State with firmness, courage and wisdom; but rather to that futile and childish attention to trifles which contributes nothing to the conduct and guidance of life, but in which people of that kind grow old in “ill-timed playmaking,”

Robert Burton in "Anatomy of Melancholy" also touches on the issue, and is

Your greatest students are commonly no better, silly, soft fellows in their outward behaviour, absurd, ridiculous to others, and no whit experienced in worldly business; they can measure the heavens, range over the world, teach others wisdom, and yet in bargains and contracts they are circumvented by every base tradesman. Are not these men fools? and how should they be otherwise, but as so many sots in schools, when (as he well observed) they neither hear nor see such things as are commonly practised abroad? how should they get experience, by what means? "I knew in my time many scholars," saith Æneas Sylvius (in an epistle of his to Gasper Scitick, chancellor to the emperor), , "excellent well learned, but so rude, so silly, that they had no common civility, nor knew how to manage their domestic or public affairs."