Hmm, so is your conclusion that dog walking startups are not venture scale? But there are several dog walking startups that have received VC funding, and at least one that's IPO'ed. I agree with all your points that makes these types of gig economy businesses difficult to be profitable, but they similarly apply to many businesses like food delivery -- so this can't be right. (unless you believe none of these gig economy apps are successful, which some people argue, but is a bit of a stretch imo).