Why did Buddha praise the vedic Agnihotra as the foremost sacrifice?

Why Buddha praises the vedic Agnihotra as the foremost sacrifice and the Gayatri mantra as the foremost meter in the Pali Canon? > aggihuttamukhā yaññā sāvittī chandaso mukham. > > Sacrifices have the agnihotra as foremost; of meter the foremost is > the Sāvitrī "On the Buddha's Use of Some Brahmanical Motifs in Pali Texts"