I didn't make an unsound point, there was a misunderstanding by you. When talking about financial assets or investment, accessible means affordable, but affordable is a relative term, whereas somethings accessibility is a useful observation - "can working-class people buy one easily?"
When someone includes statements in an argument that can be trivially disputed, they should fully expect those weak points to be disputed. The rest of the argument, imo, does not deserve critique until the trivially disputable points are resolved.