I don’t think that’s a fair assessment. Comparing to a traditional loop, it has marginally better thermals, one less set of tubing (i.e. places for leaks to spring up), and a smaller form factor. Wether or not those are “worth the money” is completely subjective. As someone interested in custom SSF builds I thought it was interesting.

...much cheaper blocks can perform the same task just as well.

We don't actually know this since no one actually test it, just to be clear.

Unless you are going the "My minivan works just as well as Ferrari for driving to work" angle, which isn't what the high-end tech segment is really about.

completely useless for practical purposes

So what, LTT does all kinds of impractical and extreme stuff

much cheaper blocks can perform the same task

not that anyone watching LTT could possibly know this, since they didn't bother to test it properly