As I said upstream, students already unfamiliar with getting much choice in their education can find the array of choice at HE bewildering.
But there is plenty of information available online, for free. If a prospective student can't use this to make informed choices about HE, what does this say about their research and learning skills? Prospective students are turning 18 - they are adults. At the same age they would be expected to make their own informed choices about healthcare, finances and so on.
When I was choosing HE (pre internet) one was much more reliant on advice from schools and sixth form colleges. Nowadays the information is available online - relevant information is given on universities' own websites and then there are unistats, league tables etc.
an unconditional offer might be just the thing to turn them away from risking a conditional offer at a higher ranked university.
It's very Mumsnet that it is taken for granted that conditional at "higher ranked" university is necessarily "better" than the unconditional offer.
League table positions change - and are gamed by universities. In the examples given above, Birmingham and Nottingham are not, for the vast majority of employers, viewed particularly differently than Bristol. (Actually they both outrank Bristol in a number of subjects.)
On the other hand if a student chooses an unconditional from a lower or mid tariff university over a conditional from a high tariff university the onus is partly on them to look at graduate prospects etc before doing so.
For some students, the decreased pressure from holding an unconditional offer may be really important, in terms of managing anxiety, dealing with family issues and so on. Of course the latter issues may well rear their heads later on - but this is not always the case, as sometimes the issues are transient.
Note that the UK HE system is very unusual in making almost all of its offers conditional. Most HE systems do give unconditionals, based on existing evidence of academic performance. It is not clear to me that the HE system moving to more unconditionals would be a bad thing.
And the issue of dropped A level grades affecting employment later - again this seems very MN. If grades are dropped substantially, this may well have some impact later. But getting ABB or AAB instead of AAA or AAA star really isn't going to affect future prospects, if the student goes on to get a 2:i or above at a respected university.