Is it not clear yet? I didn't say do not follow or react to TCAS. I did not say react opposite to an RA. Of course, you react to an RA first, PNF should be looking outside to get eyes on.
So yes, crew that are operating in RVSM airspace are trained to positively follow their TCAS
So when they don't, which has and will still happen, and force a situation that is increasingly likely to result in a collision what are you going to do? Just keep following your fallible computer in to a mid air? Stupid. Crew are also trained not to crash aeroplanes, that still happens doesn't it.
TCAS may be giving you an RA to an aircraft that you have not seen
Which, surely, is another reason to
keep a good lookout? You know, situational awareness. How good is yours if you can not see outside?