If it isn't, then that organic traffic is just a vanity metric. The goal of organic traffic is to get more sales/clients/etc right? (Check your bounce rate for this data!)
If your website takes half a century to load, those clicks are going right back to Google Search to click a different site. (Images, videos, and gifs can be the biggest reason your site is loading slow! Make sure they're optimized for web.)
Site crawlers catalog errors, and errors make google and other search engines lose trust in you! (Most common site health errors I see are no SSL certificate, linking to http:// and not https://, broken links, and no alt image text.)
These are crucial for not only site health, but in telling crawlers what your page is all about. Implementing your keywords here in the right places, in the right way is the key to rank for those search terms.