I’m new to SEO but wouldn’t it still help? If you are trying to rank for the keyword "pickles" and your url is pickles.com, every link back to your site will contain the word "pickles" because its in your url. Where as if your site was called peanutbutter.com and you weren’t able to change the tag it would say peanut butter. Wouldn’t Google say pickles is way more relevant to pickles than peanut butter is, wouldn’t they give the pickle url more consideration? Again new to SEO and I might be missing something here.