Well thought out;
-YouTube Thumbnails,
-Social media banners and posts
-Ad Creatives
Why do you need better visuals?
Because,
Humans are inherently visual creatures. Our brains are wired to process visual information significantly faster and more efficiently than text, with up to 90% of the information we receive being visual.
Someone would pass on a good YouTube Video and click on an average one if the average one has a better Thumbnail.
Facebook ads with better ad creatives get more clicks, thus more sales.
I don't think you'd want to lose clicks and sales because I can easily create graphics in Photoshop.
And If I don't get it right, revisions will be till you are satisfied.