I totally agree with most of these suggestions, but just wanted to point something out re people talking about what they can't do. Frequently they aren't being defeatist or making excuses, but are pointing out the genuine difficulties lots of people face, in the hope certain realities might start to percolate through to the hard of thinking (I don't mean you, I'm speaking generally about how these threads tend to go.)
No one is saying it's impossible for, say, disabled people to get a job, but there's a huge number of people on MN who seem extremely ignorant of the limitations some disabled people face. A lot of morons people post along the lines of 'But work will make you feel better! A few weeks of walking up three flights of stairs in an office with no wheelchair access, and you won't even need your wheelchair any more! You're just being negative! It's all a matter of mindset! You just don't want to work because you're rolling in it on PIP [!!] and get your nails done every Thursday!' OK, I've exaggerated somewhat there for dramatic effect, but you get my general point - it's important to challenge the more ignorant/clueless narratives, and in that context saying certain things aren't possible isn't negativity, it's realism.
Similarly when people are struggling to find work for genuine reasons, there's so much 'There are plenty of jobs, there must be because just the other day my local cafe was advertising for someone to clear the tables', 'They're not trying hard enough, otherwise they'd have found a job by now' (according to some recent figures many job seekers in the UK send out 50 to 100 applications before they finally strike it lucky, employers are receiving 20–50+ applications on average for each vacancy they advertise, and graduate roles can attract 140+ applicants each), 'In my day you went into every business in town with a CV until someone agreed to hire you', 'They can just retrain' (sometimes true, but takes time), and in one memorable example last weekend, 'Why don't they just set up a cleaning company, they'd be raking it in overnight and if anyone disagrees with me they're just not go-getting enough!'
The sheer ignorance and prejudice some people post on MN (again I don't mean you) needs challenging, and some so-called excuses are actually valid reasons. When people point that out, it doesn't necessarily mean that they are being negative or defeatist although I get how it could seem that way.