Why does the ARP protocol do meaningless things?

Question

Computer networks

I was studying the arp protocol in wireshark and noticed a meaningless loop

Pegatron_91:78:d4 - network card of my computer
Address: Cisco-Li_81:c1:27 - network card router It makes
sense for my computer to query the router's mac if it already knows it and forms an arp internet frame with mac address of the recipient - the router?
and I have a lot of such requests formed
analogy - I'll ask Ivan what is his name?

Answer 1

the analogy is wrong.
in fact, you are not asking Ivan, but a man in a blue T-shirt, and not what his name is, but who Ivan is here.
the computer does not ask for the MAC address of the router, but the MAC address of the one who has the IP address of interest to him.

Answer 2

Because arp entries have a lifetime.
https://superuser.com/questions/1345144/what-is-th... .