Several reasons may be suggested for this:
- their contact with the secular world for the purpose of supporting their family exposes them to heretical and immoral influences that desensitize them to the refined and holy approach of Torah in a way that would not have occurred had they stayed in the walls of the Yeshivah; moreover, even if these influences are not blatantly forbidden, they may subtly or not-so-subtly conflict with what is proper and ideal according to the guidance of the Torah;
- they have precious little time for Torah study and prayer, so they may “lose their touch” to a certain degree when compared with their level as a Yeshivah student; also, even if they exert themselves greatly, their rate of spiritual growth will necessarily be much more slow than it could have been before;
- the worry and difficulty of earning a living, raising a family, and coping with various other challenges that life brings (may such challenges be as few and as easily overcome as possible) makes it much more difficult for married people to focus on Torah study and prayer in the little time that they have for it.
How is the married person to overcome the detrimental influence of the world on his attitudes? By submitting himself to the guidance of the Yeshiva students and married Torah scholars, who have devoted their time to holy pursuits, as discussed here.