Why: even one who merely listens with faith, without cavil, is liberated and attains the auspicious worlds, again lowering the bar for genuine benefit, even simple, faithful listening without immediate full comprehension is treated as valuable.

In life: you don't need to fully master or completely understand something on first exposure for real, genuine benefit to already be occurring, sincere, non-cynical attention alone is treated here as already worthwhile.

Teaching: don't withhold sincere engagement with something valuable just because you don't yet fully understand or master it, this verse treats simple, faithful listening alone as already producing real benefit, understanding can deepen over time from that starting point.