I really don't see it at all, Google doesn't prevent anything, they just want to have more control on release process for their IDE, also Android plugin is available on Intellij, but it requi
It's also unfair to assume them, even though they changed release process recently specifically to be more up to date with upsource Intellij
But their goal is to build IDE for Android development
You could have the same complaint about any of Intellij IDE being own IDE, not just a plugin, but it's the same reason, dedicated team tries to build the best experience for specific technology/language
Intellij incorporate almost all AS features, but with delay, it's separate release cycle after all
Obviously Gemini is available only on AS because it's Google service, not open source , and it's free for Google project, unlike paid Intellij AI assistant
Using Fleet for Android is third party experience, unlike with AS and even with Intellij, but because it's an absolutely different platform, features of course cannot be easily integrated to or from Intellij/AS