The only Sisters in Mexico allowed to wear their Habits for 100 years (ended in 1990s?) were Daughters of Charity - because of their work with the poor. The Daughters’ presence and visibility saved lots of money for the government, hence the exception. So (by your reasoning) were all other Sisters - out of the Holy Habit for one hundred years - immodest, irreverent, sinful and enticing?
Vincent got it right. START with Holy Modesty. Of course, his Sisters wore headcoverings to Mass. It was the custom in France at the time. Out in the streets, however, like peasants and “common” (lewd) women, they went without head coverings to point out that VIRTUE protects the soul, not apparel. St. Vincent de Paul needs no defense. How odd you imagine he does.
Rather than seeking wisdom from me (ha!), read a book about St. VdP.