This is not true for platforms. If a community decides they're going to use Discord, then you, the individual, are out of luck. You either use that or miss out on the community or convince the entire community not to use Discord.
With each of these products we keep giving up more and more of the powerful variety that was available before. While the average person doesn't lose much, the average person doesn't really exist and we've really lost a lot of long tails of value.
Is there a moral principle preventing a power company from providing you with all your electrical appliances and forbidding you from using those not provided by them?