In addition to what others have mentioned, using elements for their stated/official purpose helps with accessibility. Yes, you can use the role attribute, but some accessibility technology works more completely if you use proper elements. (And just can be easier to use; I guess the best way to compare it is using VO on a site where everything is just divs is like the blind version of this[0] Or Comic Sans. Just visceral 'ugh'.).

[0] https://www.theworldsworstwebsiteever.com/