Should data analytics engines be highly connected to intelligent apps or should they be external apps?

Hi, I'm doing a master's in Business Intelligence and I have to write a short essay answering this question.

I believe that it shouldn't matter if the data analytics engines are connected or not intelligent apps. In principle, one could use cloud services such as AWS that are outside the organization and afterwards move the information to the intelligent apps.

But what do you think? I would like to know the opinion of data practitioners.

analytics apps data data analytics datascience intelligent