But if they aren't reaching park capacity currently, does it matter if they increase it?
But yes . .eventually they are going to hit a tipping point where more people are coming to the parks, but the rides are still running at reduced capacity and lines will be too long and hours too short for what you are paying.
I am seeing that locally with restaurants. As more and more people are venturing out and eating at restaurants "like normal", the places can't keep up due to having 50% capacity AND a severe increase in TO GO orders (that can't be throttled like table dining can be). So having long waits to find a seat and long waits for service/food is become common.
Eventually, we (as a country) are going to have to keep the masks, but drop the social distancing requirements in order for businesses to try and get back to normal operating procedures. Otherwise, the long waits and horrible service will drive loyal customers away from those establishments and into competitors arms that don't have as many restrictions.
Disney will have to do the same or have some unhappy guests.