“So just do it” is a glaring one for me.
Simply because it is disregarding someone else’s thought processes and how their mind works. Where simply ‘just do it’ is not as easily and readily accomplished. This kind of advice is always uttered when one person is going on about how they’re tired of something and want to do something else. So this gets mentioned.
It could be a lot of reasons as to why, even if it is down to the obvious reasons. My valid reason a lot of the time is that I just don’t have the energy or will to just magically get myself to do something.
“Just do it” is helpful in some cases, but mostly not. E.g. you think that a hobby is cool but you don’t feel like you could start it? Just do it, take a course, try it out. It becomes unhelpful quickly when the realities of your life are just different. Telling in unemployed person with debt who is fascinated with flying to “just get a pilot license” ignores their reality. But telling a business analyst who’s interested in manga but feels like this hobby would destroy his image, to “just do it and buy some mangas” is totally valid.
I have been struggling financially for most of my life and have received way too often the unhelpful advice to “just do it. Live a little.” Just book that 100€ flight to Italy and see Rome. Just get a smartphone, everyone has one now! (That was when smartphoneplans were very expensive here and I couldn’t justify such a high monthly cost. Yes I’m older.)
There is way too much “just do it” advise by people that live in their nice little bubble of a well-off, supportive family system and never realize that the only reason they can “just do it” is because they never had to eat rice with tomato sauce for 3 days in a row because there were only 10€ on the bank account by the 26th.
On a similar note, “just get a job, just learn something more profitable/in an industry with high wages” is also an often unhelpful advice. Not everyone can be good at everything. And not everyone can just uproot their lives and go back to school for a few years. Yes, some people can do amazing things like get a masters degree while working full-time and having kids. But this advise, too, ignores the reality of many people. If you have no support system or if you simply aren’t cut out for the currently profitable jobs, you can’t just magically switch careers. And even if you do: things change so quickly and there is no guarantee, that the currently well-paid job will still be like that in 5-10 years.