This. If I was focused solely on making the most money, I would marketeer. The only reason I farm is because marketeering bores me to tears. I once managed to make a billion marketeering, but I was screaming internally the whole time.
Even if marketeering wasn’t so clearly superior to farming for making money, there are other activities I would also do if the rewards were my sole focus. More hami raids and more WST’s, for instance. As someone that farms so much, I frankly consider myself a relatively slow reward earner.