> Typically, the selection of a programming language is predetermined in brownfield projects, leaving little room for choosing the "ideal" programming language for migration unless it is absolutely necessary (go can be a suitable option for migrations).

Yep - or it's the standard for some tasks & the important thing is being able to use the ecosystem of external packages that everyone else uses. In this case, the author is working on AI & computer vision, for which everyone else uses Python. Python could be a much worse language than it is and using Python would still be the right choice in this scenario.