Is it possible for a woman in this era to attain the rank of Siddiqiyyah, and do her smiles when interacting with men prevent her from doing so?

"A woman's work and study in a mixed-gender environment lead to corruption and evil. If a woman is compelled to work or study in a mixed place, she must avoid seclusion (khalwa) and adhere to the narrowest limits of interaction with men, refraining from softening her speech, and committing to the hijab and lowering her gaze. Repentance is accepted even if the sin is repeated, and Allah loves those who repent. The rank of Siddiqiyyah (truthfulness/sincerity) is the highest rank after prophethood, and it is attainable in every era. The truthful ones (Siddiqoon) are of varying degrees. The occurrence of a Siddiq in some sins, without persistence, does not prevent him from attaining this rank."