The basic issue is that it is frustrating to put a lot of work into creating a pattern only to find that when you print it it is not scaled perfectly. If you save the pattern as a PDF layout and take it someplace to print on big paper the scaling may be correct. If you use some utility to tile and print that same pdf on a printer with small paper, you take the time to attach the puzzle pieces together and you find that the result is NOT QUITE a pattern that fits. I understand that the internal scaling (90 vs 96 dpi is one example) is not the same for all printers and all utilities. I understand that Roman did not have the time to try many different programs to see which would and which would not print correctly.
The tiled print from valentina can produce many blank pages. I found that doing a preview tiled pdf then manually selecting only the pages with content worked best for me. It is possible to go through a process every time to do this but it gets tiresome