If you're anything familiar on how SaaS offerings work, it needs huge cloud infrastructure to make it happen. How do gamers on almost any device (mobile, console, pc, etc) on any network able to access their content, games, account, etc? It's quite damn complex and on top of that if you have a game across different ecosystems (ie xbox live + nintendo online services) further creates headaches.
You need a super robust and industry leading cloud architecture in order to do that. Azure is near the top when it comes to cloud and it took years to get it where it is now with billions of invested.
Sony / Nintento cannot just 'buy' their way into this. They cannot simply just say buy AWS and make this work, it's not that straight forward. Unless they have been secretly brewing this for years, we won't see their equivalent for awhile.
lmao that's some seriously strong koolaid you've been chugging.
The entire point of AWS and it's tiny competitor Azure is that yes, anyone indeed can just buy their way in to the services they provide!