I feel like that case was true back when this fight actually mattered. These days people use native-ish apps on iPads and smart TVs and not just laptops. So I think there is less market power on the web's side than there used to be.
Google and Microsoft both sell the CDMs (content decryption modules, ie, the actual DRM components used in EME), and it was certainly a benefit they touted for consumers before Firefox had an implementation as well.
Now anyone who wants to make a web browser must pay to play, and the people you pay are your competitors. Even if you could write your own CDM and get it ceritifed/trusted or whatever, you'd still have to convince every DRM-using video provider to also use it in addition to the others, which is going to be a very tough sell. And of course, it may be that no one wants to license a CDM to you to start with, and now part of the web is closed off to your users.
Google and Microsoft both sell the CDMs (content decryption modules, ie, the actual DRM components used in EME), and it was certainly a benefit they touted for consumers before Firefox had an implementation as well.
Now anyone who wants to make a web browser must pay to play, and the people you pay are your competitors. Even if you could write your own CDM and get it ceritifed/trusted or whatever, you'd still have to convince every DRM-using video provider to also use it in addition to the others, which is going to be a very tough sell. And of course, it may be that no one wants to license a CDM to you to start with, and now part of the web is closed off to your users.