I don't think think you addressed the majority of the points made.
Perhaps you have generalised your opinion of PA's.. and almost stereotyped it.
I for one, am more than happy to take responsibility, the saying "we are not doctors" - is simply because we aren't. We are more then happy to complete the same tasks, but we are a NEW type of medical professional. The term doctor is literally, just a term. Hence why we don't call ourselves that. It doesn't mean we can't do similar or the same things.
You act like working a 9-5 job is a bad thing. Wanting a life is not a bad thing at all. I for one, have done many night shifts, and am not scared of alternative shift patterns, but I'm sure you'd agree having some stability in your personal life, I.e Monday-Friday 9-5, is a lovely thing.
You have completely misinterpreted not wanting responsibility. We are more than happy to have it. Just because we want a life, and don't want to sell our soul to a hospital to get somewhere in life, doesn't make us bad people. We can take part in clinics, and lots of other things that consultants do. However, in my opinion there is far too much work load pressure on consultants as it is. I'm not ashamed to say I don't want that.
I would never refuse to do anything, or back off just to be lazy or pass responsibility. It's a shame you have met people like that. I'm more than happy and so are the majority of PA's, to do anything we are trained and confident to do.
You mention cannulas and TTOs like they are a demeaning job. This is the problem with medicine, people focus too much on a hierarchy and look down upon others.
They are jobs that might not be as interesting, but still have to be done.
I would do any job, regardless of how menial you think it is, to care for patients. That goes from simple jobs to the most complicated, if I'm trained to do so of course.
I hope you do meet a PA that can change your rather... negative opinion
Remember we need people that aren't so patronising and rude, to make medicine a more appealing field of study
!