Auto-brail screen readers exist. If someone has the means or has a gov subsidy can read text on the internet Taxis to support wheelchair users don't, or at least done exist enough to subsist off the profit motives necessary to keep the service alive.
If someone had a government subsidy then they could use the money to pay the market price necessary to make such a service viable. If the government wants that subsidy, why should they impose that cost on a particular industry instead of paying for it out of the general fund?
So what is your point?