Because you have a hammer and so everything sounds like a nail.
When you discuss a problem at a high enough level of abstraction, then yes everything looks like a database, and at a high enough level of traffic all databases need to be partitioned/replicated.
The much more interesting question would be "why doesn't the thing I'm familiar with solve this problem"?
When you discuss a problem at a high enough level of abstraction, then yes everything looks like a database, and at a high enough level of traffic all databases need to be partitioned/replicated.
The much more interesting question would be "why doesn't the thing I'm familiar with solve this problem"?