What I mean by disadvantaged, I refer to those with a disability, those with bad childhoods such as family-related abuse, those who are looked after children, etc.
You may think this is something helpful and beneficial, ostensibly, but in reality, it is otherwise.
There is this popular phrase that which teachers often tell them, often so that the kid just relaxes and does not panic. While panicking and stress are nowhere better, telling someone to just try their best reduces their motivation. For example, an A-level student may have ambitions to be a journalist, a social worker, a doctor, a lawyer, accountant, blah blah blah. For these roles, you must have take in much more merit, effort and hard work, if you do not achieve those grades, you will not be at an advantage, these roles are vital and need the perfect one. If you just tell them to just try their best, this is useless advice; not supporting those who actually want achieve such efforts. Not just grades, any classes, or roles, etc.
Those who are disadvantaged they are just told that because of stereotypes assuming that they cannot do this. Consequently, creates a literal self-fulfilling prophecy indirectly as they are told that they are not viable individuals. Prominent people also faced the same thing. Kemi Badenoch when she did her A-levels in Maths, Chemistry and Biology, her teachers undermined her efforts, giving her low expectations and demanding her to just be a nurse (a lower-average middle class role). Sajid Javid was blocked from doing GCSE Maths and he can just be a TV Repairman at his old school because of his living and family conditions.
I am doing A-Levels in Politics, Business and Sociology. My Sociology teacher was telling me to just "try my best" in the mocks, but in reality, there is a culture in colleges in the UK in which students who need genuine help get expelled instead of support because they want more reputation competition - this is not to say that this is better, but the culture of low expectations from teachers gives little to no motivation, and makes students intentionally lazy. I am from an average middle class background and I should not be spoken like that simply because I am not an upper middle class person. Not to mention in my Sociology class, my teacher is too relaxed about students.
This is not just in education. Also in extra curriculars, workplace, sport, creativity, etc.
Of course, the other side in which teachers being overly disrespectful and too sharp are nowhere better as they also label certain students as dumb and stupid while not being supportive of some students, but this is just the corresponding side of the same coin. Neither are helpful.
Hard work is the way to achieve success. But of course there are issues like unsanctioned cronyism and nepotism (initially class based but now community based as a result of too much in-depth multiculturalism), but nevertheless, having soft expectations do not improve any effort. If someone is of a disadvantaged background, they need sufficient support and advocacy to ensure they achieve those high expectations to escape and to succeed.
In conclusion, just telling someone to simply try their best is not supportive for struggling people. It backfires. Tell them to stay out of their comfort zone.