The thread seems to have got lost somewhere, I was referring to the object stated in the OP.
If the general opinion of those here is that the fitting of a non-replaceable fuse in a high priced item is OK.
My point is that Transformers are one of the most widely used component in the electrical world.
And fortunately having installed many hundreds of all different stripes, the only one I have come across made this way is small ~50va versions, where the replacement cost is minimal.
Also fortunately my manufacturer go-to, AnTek, does not use this practice.
Also aparently it is frowned on here to have an opinion!