IMO, the point with secondary isn't so much that there's something wrong with it as that it often (usually) just isn't necessary.
After years and years of religiously racking to a secondary I slowly drifted away from it out of laziness and having other things occupy my time (children being one of those).
Since failing to use a secondary didn't seem to harm my beer in any way I simply stopped doing it.
If you want to do it or feel you need to do it, and you do it carefully, there shouldn't be any issues with using a secondary. It's just one more thing to sanitize, etc. though.
But using it as a mechanism for controlling gravity seems like a risk.