Only one (the first) of the four quotes you've chosen restrict market forces in the way you are envisioning, i.e. white workers don't want black competition. I'd be interested in what the next sentence was, and wouldn't be surprised if it was "no white barber shall serve as a barber to colored women". (Aside: it seems like lots of these snippets are floating around the internet with little by way of attribution.)

The remaining three are "separate but equal". We return to the question: what about these laws required that the "separate" facilities be of lesser quality? Nothing about "separate but equal" immediately screams "discrimination", but as we know from history, it can end in discriminatory practice. The de facto ramifications of the laws were that black populations suffered (economically/educationally/etc.) at the hands of white populations: the market forces were not strong enough to encourage a lifting of the laws, or genuinely equal facilities, as Frondo suggests. Similarly, market forces may not be strong enough to encourage Airbnb hosts to serve all potential customers equally.

Your causation is backwards: people created the laws (under guise of equality) because they wanted to discriminate (and, if you want to boil everything down to some ahistorical economic gesture, it resulted in market forces tilting in their favor). To say that the laws stemmed from the economic implications is a stretch, especially post Plessy.