A lot of normal people may routinely act charming and game social interactions, but they generally aren't being "manipulative" in the process. "Manipulation" is really just a polite word for routinely lying and BS'ing people on the off-chance that they are going to be fooled and/or not want to call you out on it.

If you're reasonably socially skilled, you can usually see it coming a mile away and react accordingly, but what gets you in trouble is the not-so-common case where you actually fall for it, since the consequences can be quite bad. None of this is describing ordinary social interaction, tough; these are really two entirely separate topics, and there's little reason to conflate them.