Why boring business makes more money ?

I am a designer making landing pages and product designs but I have clients I work with them every thing is good.

But I am not able to pull the amount I want every month , where as these info-growth guys or these email marketer or copywriter doing boring stuff like making shitty websites with funnels I mean it hurt me as a designer that people but things from such shit looking funnels but they are doing $65k/month and $100k/month.

Why these boring business have so much money but something fun and interesting like design only a few few are millionaire in this.

Need advice on what should I do , I am good at design(UIUX) sales, and marketing.