It's all about passion
There are some strong and important reasons for that:
SEO stands for Search Engine Optimization. Simply put, you are improving, enhancing, or altering your website so that a search engine will rank your website's articles, products, services, or content in general on the top of the front page.
Paying for Google Ads only fixes your problem temporarily until you run out of money. And the traffic from Google Ads counts as payed traffic, this has nothing to deal with the organic traffic. Acquiring organic search results does take time, but it will last much longer than any Google Ad campaign.
You want to learn more about SEO?