I agree for the reasons stated - it avoids accidentally giving your opponent a bad rack.
In Straight Pool there are no real problems with rack your own. Obviously pattern racking is a non-issue. So is rigging a ball to wire it since it doesn't do any good unless the break ball is made - in which case the shooter gets to continue anyway.
I suppose the situation could come up where a player gives himself a rigged rack because he intends to use it to play a safety after the break shot, but frankly even in these situations it is almost always more predictable and reliable to play a safety off a good tight rack, so I doubt this is an issue either.