Second, I agree with the post you're replying to.
Regarding accreditation, the point is that it effectively makes no difference whether QS or THE ranks your university as No. 6 or No. 106. They're both pretty good. But everyone knows that there's variation in the quality of graduate of any given university, and they take that into account.
It will make a difference, however, if the university is ranked in the 600+ category. That institution would probably be grouped in with "the rest".
If you're looking for certain jobs in finance, law or academia, then the institution matters much more. Those areas are perhaps not quite as meritocratic as they should be.
However, if you're applying for a graduate tech job in the EU, it really, really doesn't matter that much if you got a 1.1 from Cambridge or a 1.1 from Dublin City University. Both will probably get you an interview, depending on what else is on your CV. And at that point it's a level playing field - the interviewers won't be dazzled by the name of your college, they'll just grill you to make sure you know what you need to know and can learn fast enough to be useful in the company.
The last four large companies I worked at or contracted for didn't even look at what university I went to 15 years ago, or how certified I am. The past 5 or 6 years were relevant, and that's about it.
Perhaps if you are inexperienced or all you have is your years at a University it might matter at your first entry-level job. Or if you want to purely work in academia. But that is not what most of the MS or BS work revolves around and it is not where people are needed the most.
Unfortunately, it seems like the parent poster never had colleagues from top universities. There is a reason that google is in Zurich, Munich, etc... and not next to random universities.
In general (exceptions always exist) there is much more potential in people who have finished 'good' universities. They are finishers. They dont give up and do whats needed to reach their goal.
We select on merit, drive and competence applied recently. And where you got your MS or BS or if you have one at all weighs proportionally to the rest (and in the past 2 years we haven't even had anyone join any of the teams where it even mattered if they had one at all because their were selected on the rest).