Everything has a cost. Serving special needs may costs more. A rich society can decide and afford to cover that cost and that is perfectly fine. A developing economy on the other hand, may decide to impose that cost on its businesses, thus unwittingly weakening itself.
Regulation is not free and doesn't magically make our wishes come true. It just moves costs around, hiding them and often preventing the free market from minimizing them.
Generally in rich countries, it is not "the society" that covers the cost. For example, government does not give money to grocery stores to create ramps and accessible bathrooms—they fine the stores that don't have them. That's the core of accessibility regulations in rich countries, like ADA in the US.
The difference between rich countries, the government forces the businesses to accommodate people with disabilities at the cost to the business. In poor countries, at least the one I came from, they leave it to the businesses to make that decision themselves. The result is that in rich countries are much more accessible than poor countries.
I don't know if your model (where "the society", which I guess means the government pays for this stuff) is tested in any jurisdiction. If it has, I would appreciate a link to an article about the results. But the model where businesses are forced by regulations to cover the costs works very well, as evidenced by how accessible US is thanks to ADA.
The money always comes from the citizens, no matter who pays. If the government pays - it is taken through increased taxes. If the business pays - it is taken through increased prices. But it's always the people's money - lifted from you and me.
The difference is whether the whole society pays (via taxes or higher overall prices at the till because of the higher cost of doing business) or the person needing the extra service does. In the countries without anti-discrimination laws, those in discriminated groups (like people with disabilities) tend to have a much lower quality of life—they cannot get hired, even if they get hired they earn much less, they cannot access services, even if they can they must pay much more. In the societies that have these sorts of regulations, the whole society bears the extra cost, so everyone's individual burden is lower and manageable.
My point still stands—unless the society via regulations forces businesses to accommodate groups like people with disabilities, those groups will be excluded from society, as they are in my old country.
There is no such thing as a free market without regulation. Governments create money, they regulate it. Without the regulation of how business is conducted and how things are transacted there would be no market, do you realize that?
Regulation is not free and doesn't magically make our wishes come true. It just moves costs around, hiding them and often preventing the free market from minimizing them.