Shields are reason ...
I would like to remind my old wish for Martial classes to have additional weapon slot(s) ...
I mean, even Fighter in player manual (im not sure if its even possible to get more official info than this picture)
![[Linked Image from dndbeyond.com]](https://www.dndbeyond.com/avatars/thumbnails/6/359/420/618/636272697874197438.png)
CLEARLY have multiple weapons prepared for immediate use!