Really it is a matter of relative costs to everything. They already have the skillset to be thoroughly unimpressed. It would be like if someone tried to sell you a magnifying glass that would read words held under it out loud. You can already see fine and read it - why on earth would you want that? Well it would be a useful tool for the illiterate and blind.

The first assessment isn't wrong but limited in its scope to people like them. The blind and illiterate might 'overvalue' it as a priority. Getting the actual value is hard to tell prior to knowing the whole state of the market with a lot of work. It might become a best selling memetic "gag item" like the horse head mask or be useless even in the target market practically.