These are obstacles to samādhi, though they are powers for the outward-turned mind.

Te refers to the siddhis mentioned. Upasarga is obstacle, impediment. Vyutthāna is the active, outward-turned mind. Siddhi is power, accomplishment.

This sutra is a crucial warning. The siddhis that seem like achievements are actually obstacles to the final goal.

For the ordinary mind (vyutthāna), they are impressive powers worthy of admiration. For the serious yogī, they are distractions.

Each siddhi can inflate the ego, generate attachment, divert from the path. The yogī who stops to enjoy their powers stagnates.

Vyāsa is emphatic: siddhis are like poisonous flowers. Beautiful but dangerous if taken.

The correct attitude is to notice them without attachment. They may arise as side effects, but should not be sought or cultivated as ends.

The goal is kaivalya, liberation. The siddhis still belong to the domain of prakṛti, however subtle they may be.

This sutra reorients the reader after the long list of powers.