«يَسْأَلُونَكَ عَنِ الْأَهِلَّةِ قُلْ هِيَ مَوَاقِيتُ لِلنَّاسِ وَالْحَجِّ»
“They ask you about the new moons. Say: they are markers of time for people and for pilgrimage.” (al-Baqarah 2:189, excerpt)
“People” is the broad category. Pilgrimage is one important activity within that sphere, singled out for its religious significance.
This is a case of mentioning a specific instance after a general statement. The added particular does not imply that pilgrimage lies outside human affairs. Instead, the formulation draws special attention to its scheduling and ritual importance.