SMF are what they are...nothing more...no put down whatsoever, but, it certainly doesn't take a whole bunch of talent to load in a SMF, press play and sing over it...the resulting product is then focused on the capability/talent of the singer, not the arranger...but I digress.
So your saying the "talent" it takes to record tracks and play/create a SMF backing track to play on top of and sing....doesn't mean anything?
If you actually read my post, you'd realize that is
not what I said.
A SMF is still a
pre-recorded background of a full song, no matter who created it...if you can make your own, that's peachy.
However,
anyone can take said SMF, load it into a keyboard or file player, press PLAY, and then sing over it. Then, the actual talent becomes how well
the singer performs, because they aren't actually playing while singing...it's basically Karaoke.
Of course, nothing wrong with Karaoke...it's very popular.

Kudos on making your own files.

Ian