B.G 4.09

जन्म कर्म च मे दिव्यमेवं यो वेत्ति तत्त्वतः। त्यक्त्वा देहं पुनर्जन्म नैति मामेति सोऽर्जुन ॥९॥

O Arjuna, One who understands My birth and actions as divine governed by the principles, is not born again, after renouncing the body, as he attains Me.

Gīta Bhāshya 4.09

The word 'tattvataḥ' provides exclusivity to such knowledge, stating only when one understands all the governing principles and gains insight into the birth of the lord, then one doesn't get re-birth, i.e. gets liberated.

पृथङ्ग् मुक्त्युक्तिः सर्वज्ञाननियमदर्शनार्थम्। न तु तावन्मात्रेण मुक्तिः इत्युक्तम्।

The complete solution to liberation is possible by having overall insight and understanding of the governance principle behind lords' appearance. Indeed, it is conveyed, liberation is not possible by merely limiting one's knowledge.

"वेदाद्युक्तं तु सर्वं यो ज्ञात्वोपास्ते सदा हि माम्। तस्यैव दर्शनपथं यामि नान्यस्य कस्यचित्॥"

इत्युक्तेश्च महाकौर्मे।

"I certainly grant him the path of realization, whomever worships Me always, having the understanding of Me as described in Vēdas; Not for others, at any point in time."

- thus stated in Mahākaurma Purana.

अत्रोक्तस्य एतत् ज्ञात्वैव जन्म नैतीति गतिः। इतर वाक्यानां नान्या गतिः। 'नान्यस्य कस्यचित्' इति विशेषणात्। 'तत्त्वतः' इति विशेषणाच्च सर्वज्ञानम् आपतति। यत्रैवं भवति तत्र तत्त्वतः इति विशेषणे न विरोधः। उक्तं च–

In this context, providing exclusivity to knowledge, saying only then one doesn't get re-birth is of importance. This statement can't be ascertained in any other way. The phrase 'Not for others, at any point in time' in Mahākaurma Purana is the speciality. Similarly, the phrase 'those who understand the underlying governing principles' (tattvataḥ) is the speciality, emphasizing by overall knowledge of all principles only end goal is possible. Wherever specific statements are made, there, the phrase 'those who understand the underlying governing principles' (tattvataḥ) must be added as speciality to resolve contradiction. Thus, it is said:

"एकं च तत्त्वतो ज्ञातुं विना सर्वज्ञतां नरः। न समर्थो महेन्द्रोऽपि तस्मात् सर्वत्र जिज्ञसेत्॥"

इति स्कान्दे ॥९॥

"A man is not capable of understanding everything without knowing a single aspect of the governing principle. Therefore, even the great Indra looks for the analysis and insight in every field."

-stated thus in Skanda Purana.

Gīta Tātparya 4.09

Mere birth and actions don't give liberation. It is the integration of the knowledge of all qualities mentioned in Vedas and Epics that results in liberation.

"येषां गुणानां ज्ञानेन मुक्तिरुक्ता पृथक् पृथक्। वेदेषु चेतिहासेषु सा तु तेषां समुच्चयात्॥ एवमेव शमादीनां नान्यथा तु कथञ्चन॥"

इति ब्रह्मवैवर्तवचनात्।

"It is emphasized in different places. The liberation is possible always only by the integration of the knowledge of the qualities that are mentioned in Vedas and Epics, by control over senses, devotion, and such activities; not in any other way."

-such is the proverb from Brahma Vaivarta Purana.

जन्म कर्म च इत्यादिषु न तावन्मात्रेण मोक्षः ॥९॥

The phrase 'Janma karma cha' does not mean merely by birth, action, and such activities one obtains liberation.