Perhaps because sufficient number of non professionals typically won't pay an amount of money that pays for a top notch development team. So in the non professional market, you have labors of love like GIMP and DarkTable
If your content doesn't generate revenue or revenue generating leads, you have a hobby and need to decide whether to invest in the hobby.
Edit: in my last trip to China, I actually saw the mushrooming "mobile live video streaming influencer" industry and looking at their equipment (portable large battery powered klieg lights, audio gear etc.), it's pretty clear the influencers were investing.