Jesus liked to use vivid imagery to describe His love and care for people. There’s nothing special about sparrows; in fact, they were worth less than a cent. Yet Jesus says they are still cared for by God in heaven. An even more amusing and memorable picture might be of God counting how many hairs on your head and noticing every time you lose a strand.
This is how these parables work, we get a vivid picture in our heads, and it reminds us of how extravagant and careful the love of God is. You might be worried about provision right now or wondering if God cares at all. Well, read this Scripture again. If He cares for the sparrows, He will certainly care for you. And if He knows the number of hairs on your head, He certainly knows you.