The Torah is the name of God. (See Ramban in his introduction to his commentary on the Torah.)
When a person studies Torah, he is calling out to God by His name.
Yet when a person calls out to God not by name, but rather in a less intimate way, it cannot be said that he is “truly” calling out to God.
It may be an expression of a person who wants to call out to God, which itself has value.
Nevertheless, true calling is achieved by using the proper tool, the Torah, in order for the call to reach God, to be heard, and effectively draw down the divine influx.
Rabbi Adin Steinsaltz