Not entirely accurate. As I said, a sloppy attack can bring different physics. A throw has to take into account the input given, and the input can be vastly different from a sloppy attack. If I tried a nice, neat hip throw (something seen fairly often in Judo tournaments) against someone over-committing in a rush, I'll get knocked down. The throw has to be expanded to deal with that extra input - input which is very unlikely to occur with a skilled opponent.Depends what you are training for. A defence against a good attack will stop a sloppy one. A defence against a sloppy attack probably wont stop a good attack.
Or.
I can do pretty much anything I want against noobs. But I would not do those same moves if the stakes were high.