Oh, but they will. Try them and see. Have you? I have.
Have you read the entire filmscanner.info reviews? Again, I have.
Based on a lot of reading and several years of use, I reckon the main problem with the Plustek 7600i is not resolution, but that it can easily drive some impatient types quite mad by having to endlessly move the film holders image by image into the scanner. Otherwise, the Pluseks have it all over the others.
Nothwistanding all the above, the bottom line in all this discourse is the old "horses for courses" theory. If one owns a scanner and it does the job, well and good. By way of an example of this in action, my Epson 600 is not particularly recommended by any source for 35mm, but with careful use and sensible post processing (also good negatives to start off with), I can get 16x20 and even 20x30 prints from 35mm. Not easily, but doable.
So entirely without prejudice.