In principle, I agree with you. On the other hand, what is the difference between "We don't want to offer captions" and "We don't want to build wheelchair ramps"? How about "We don't want to serve or hire [ethnicity]"?
But yes, I agree, there isn't a big difference there, and personally I'm of the opinion that the government shouldn't be in the business of regulating any of it.
I feel like that already with sweatshops/child labour already - you hear a couple big companies when it hits mass media, but it's no doubt widely spread, so boycotting scandalised company of the day might not be effective (and just incentivise better PR/press control).
I still remember all those "whites only" stores going out of business in the 50s...
Sometimes there need to be rules and they need to be applied evenly so nobody has an advantage that others don't. If one business has to build wheelchair ramps or close caption while another doesn't, that's an unfair advantage.
You can dislike government all you want, but don't pretend these things we have would magically occur without some kind of intervention.