I understand it the same way but I wouldn’t say it “brings nothing”. Applying LP to an old profile without the original settings will obviously not turn the old profile into an authentic version of the real amp. It will however introduce a whole range of tone shaping options which weren’t there before. The results may or may not sound good but there is nothing wrong with experimenting. I am sure some people will find killer sounds that they love this way.
Well, this might be.
But for me, and I'm using and will still use "old" profiles in the future, the actual "hype" about Liquid Profiling is not appropriate.