गोविन्द भाष्य (श्रील बलदेव विद्याभूषण - अचिन्त्यभेदाभेद वेदान्त ब्रह्मसूत्र भाष्य सटीक)

Candraloka. Why not? The sūtra explains that only they who perform pious deeds
or are situated in true knowledge (vidyā-karmaṇoḥ) travel to the worlds of the
devas and pitās. That is the description of the scriptures (prakṛtatvāt). In the
Chāndogya Upaniṣad (5.10.1) it is said that they who are situated in knowledge
travel on the path to the devas. In Chāndogya Upaniṣad (5.10.3) it is said that they
who perform pious deeds travel on the path to the pitās. Thus when it is said that
all (sarve) go to Candraloka, the meaning is that all who have qualified themselves
in these ways go to Candraloka.
Here someone may object: Is it not so that without first going to Candraloka it
is not possible for sinners to attain a new material body? This is the reason:
Because (without first going to Candraloka) it is not possible to offer the fifth
libation (by which one attains a new body). Therefore, in order to attain a new
material body, all must first go to Candraloka.
If this objection is raised, then the author of the sūtras gives the following
reply.
Sūtra 19
na tṛtīye tathopalabdheḥ
na—not; tṛtīye—in the third; tathā—so; upalabdheḥ—because of the
perception.
Not so in the third, for it is so perceived.
Purport by Śrīla Baladeva Vidyābhūṣaṇa
In the third place there is no need to offer the fifth libation to attain a new
material body. Why not? The sūtra explains: "tathopalabdheḥ" (because it is so
perceived). This means: "Because the Śruti-śāstra affirms that it is so." In the
Chāndogya Upaniṣad the following question is posed:
yathāsau loko na sampūryate
"Do you know why the world never becomes filled?"
The answer is given (Chāndogya Upaniṣad 5.10.8):