As I learned through the years, anyone that decides to step outside the SDK tooling accepts the lack of productivity that entails the extra work, making the unofficial tools fit into the SDK expectations.
So why should JetBrains spend development resources (work time * salary / hour) into something that isn't a standard tool just to get brownie points?
Because Bazel is partially already supported. Google uses it internally a lot, and a lot of the Android buildfiles have been / are being migrated step by step either from Make to Ninja, or from Make to Bazel, long term.
Itβs a huge improvement.