Well, if you define “Living in the present” as “denying and running from any thought that pertains to reasoning based off information from the past and looking at future possibilities”, I agree with your claim that that isn’t a good thing.
As for that “that’s what we are” nonsense… I covered that.
However, “living in the present” can refer to something else–realizing that
you are (=) (living in_ the present *subjective experience).
IE what you presently experience (whether “living in the past or future or fantasy” at that moment) is (the most accurate) what you are–your interpretation of things being good or bad is you, at that moment, deeming something good or bad. Deeming something bad is due to associating it with “bad”, which itself only has meaning in terms of certain experiences–pain, anxiety, illness, etc. (that we would all experience as bad); oftentimes we (due to placing so much emphases on being or maintaining “good” in the future, or “avoiding bad”) curse our present experiences (refuse to accept/“live in” the present moment) because neuronal networks process a (perceived) form (communicable “thing”) as “bad”, due to its associations with associations with associations etc. etc. that bridge to the “bad” (avoid) network.
However, most of the time, these “bad” things aren’t actually “bad” (in the root meaning of the term as I’ve described it)
–they’re not causing states (of physical pain, illness, etc. that we’d all agree are “bad” (something one ought to not consciously seek/encourage/cause)–
but instead cause a small irritation/frustration that, I don’t think, ought to be equated with (experiences of a socially-shared label of) “bad”, because
(with the exception of using drugs or surgical procedures to remove–or, at least, circumvent–certain “emotional functions” in the brain)
it’s not a realistic/practical goal to try to avoid experiencing them; “Bad” can only have a useful, practical meaning if it clearly refers to certain kind of states that–resulting from certain concrete, easily communicated things (rape, puncture wound, poison, etc.)–are not only agreed to be states we all want to avoid, but actually possible to correlate with easily communicated things and actions so that they can be successfully avoided.
People oftentimes equate the perceived source of “bad” with their state of irritation (which itself isn’t a productive use of “bad”), convincing themselves they ought to feel irritated by the bad thing, convincing themselves the bad thing ought to not be (that which makes it bad), but–not understanding their own role (of experiencing it, and deeming it “bad”) in the resulting irritation, they impotently try to “fix” the bad by–rather than telling themselves it isn’t anything to worry about, or placing their focus on some other (socially shared) present thing (in the environment)–analyzing all the potential “bad” effects of the “bad” thing (as well as all the “bad” things that likely caused it) reinforcing and building their irritation and making themselves miserable.
The (actually practical/productive) intended meaning of “Live in the present” is meant to curb THAT. THAT is the context for that statement–having better experiences; the context is that you always live in the present (that is the definer/judge of value), and that experiences should be considered as such. It doesn’t mean you shouldn’t think about the past and future, and use reasoning, but that there should be a present grounding in it (it should be done to practically make better present experiences).