Krishna shifts the subject. There are people deeply learned in the three Vedas who perform yajnas, drink the ritual soma, and purify themselves of sin. They seek passage to heaven. And they get it. They reach Indra's realm and enjoy its celestial delights. Krishna states this as a fact, not as criticism.
The word 'puta-papah' is worth noting. The yajna purifies. It is not mere wish-fulfillment. These performers have genuine merit. But — and this is the turn that comes in the next shloka — there is a ceiling to this path. The pleasures of heaven are real, but they are not permanent.