Of course you can't imagine anyone using it because (a) you are not the target audience and (b) you are being deliberately contemptuous about the product because it was built by IBM.
If you simply re-read all your own points from an objective standpoint, it should be apparent that this is geared towards individuals who have minimal or no machine learning (much less deep learning) experience; but nevertheless feel they need features like custom image recognition in their application. Rather than spending time and money hiring a 'seasoned ML engineer' such as yourself, they can try this and see if it works well enough for their purposes. Everything from the HTML interface, dearth of model customization, no parameter tuning, etc. points to this use case. Yes, it will be tedious, time consuming, and perhaps a bit unintuitive at first but it will be nowhere near as difficult for them than if they were to build an equivalent data pipeline, neural network, and evaluation setup on specialized hardware using Tensorflow. From that perspective, this could be a great product for application developers.
Finally, there are tons of REST APIs that enumerate all the functionality found here. They are all part of the Watson Cloud catalog. This includes loading data, training, and deploying models. Moreover, is it really necessary to insult IBM engineers by insinuating that they haven't kept up with the broader paradigm shifts in the field? They build what they are told to build by management (just like at the Big 4).