Earlier quoted context omitted.
I didn't say it did, sorry.
Oh okay, in that case there's no real example you've given for the cost, so $30 may or may not be the cost, but considering a high-end rig approaches $3k and is relevant for 5 years, $30 is a great deal, especially if you get access to a large game library, which is what's happening. Origin isn't relevant to this conversation.
$15/month for a streaming service + $15/month for game access service equals, drum roll, $30/month.
What are you not getting here? Origin is relevant as a reference point for what the games themselves cost on a subscription.
Stadia still needs to actually pay for games, after all. Either as a subscription (reference origin's pricing), or you straight up buy them at the normal $60/pop.