It's just where a lot of the tools are. And why all the tool are in the python camp is probably b/c the academic/scientific community adopted the python ecosystem at a high rate.
And many in scientific industries came from tools like Matlab backed by heavy enterprise support contracts. Python was the first real foray into open source (FOSS) for many of them.
Some adopted R as well but it just didn't take off the same way even though it really was/is a better fit for some use cases.
Some adopted R as well but it just didn't take off the same way even though it really was/is a better fit for some use cases.