Errrrm... No. Don't get your philosophy from LessWrong.

Here's the part of the LessWrong page that cites Simulacra and Simulation:

Like “agent”, “simulation” is a generic term referring to a deep and inevitable idea: that what we think of as the real can be run virtually on machines, “produced from miniaturized units, from matrices, memory banks and command models - and with these it can be reproduced an indefinite number of times.”

This last quote does indeed come from Simulacra (you can find it in the third paragraph here), but it appears to have been quoted solely because when paired with the definition of simulation put forward by the article:

A simulation is the imitation of the operation of a real-world process or system over time.

it appears that Baudrillard supports the idea that a computer can just simulate any goddamn thing we want it to.

If you are familiar with the actual arguments Baudrillard makes, or simply read the context around that quote, it is obvious that this is misappropriating the text.