Honestly what is the point of user-agent at all if it needs to be set to some changing, magical incantation in order for a browser (or any other agent) to be fu

Honestly what is the point of user-agent at all if it needs to be set to some changing, magical incantation in order for a browser (or any other agent) to be functional? I hate the direction the internet and tech is going, and I hate even more that I'm seemingly powerless to do anything about it