It is important for a yid to have his daas shaped by the Torah and not by the whims of society. Talmud Torah is the way to help our mind work the way Hashem wants it to. If not, you have people who issue statements like “That’s the only reasonable psak” which was stated by a commenter on a different thread. One must conform his reason to the Torah, and not make halacha conform to his reason.
The reason for Mitzvos are to shape our actions according to hashem’s Middos. Learning Torah Lishma shapes our whole thought according to Hashem’s thinking.
I will 2nd midwesterner. You have many simple Halachic and Hashkafic issues that people are ignorant of and mostly it is due to lack of Torah knowledge (which leads to leading a life style not totally conforming to the Torah)