I would like to know what our scriptures would say about prayopavesa. If deciding to end one’s life is wrong, why is it prescribed in our scriptures?

For example Vishnu purana clearly says this: "THE son of Druhyu was Babhru; his son was Setu; his son was Āradwat[1]; his son was Gāndhāra[2]; his son was Dharma[3]; his son was Dhrita[4]; his son was Duryāman[5]; his son was Pracetas, who had a hundred sons, and they were the princes of the lawl...