It probably didn't mention how MCAS could override pilot input because MCAS could not override pilot input. It is the other way around any trim input by the flight crew would (and did) override MCAS. That is how the penultimate Lion Air flight continued to a safe landing and how the first 6 minutes or so of the Lion Air crash flight proceeded. It was only when the PM on that flight took over and ceased to trim back to unloaded just 'blipped' the trim to stop MCAS that nose down trim increased to uncontrollable levels.
Is trimming not a standard practice anymore?
Exactly. This is the crux of the issue.
Of course the crew should never had to deal with it by design but it was controllable.