And so on…
Question 4:
Why did Harry have to be the one to locate and destroy the horcruxes? I’m sure others (e.g. Kingsley, Moody et al) could have done a much better job.
Harry upon discovering the final plan…
How neat, how elegant, not to waste any more lives, but to give the dangerous task to the boy who had already been marked for slaughter, and whose death would not be a calamity, but another blow against Voldermort. (‘??? ?’, ?? ????)
This justification aside, there are numerous reasons why Harry had to be the one who carried out the work.
Firstly, the culmination of the plan, as many do not realise, was that Harry had to sacrifice himself willingly. This had the dual purpose of killing the Horcrux inside him, and extending the protection of Love over all Voldermort’s enemies.
This is evident in the Battle of Hogwarts, where after Harry’s sacrifice (despite it not actually being ?????), all spells Voldermort casts, including the numerous silencing spells, ????? the Body-Bind curse on Neville, are easily broken. This being Dumbledore’s fail-safe, that Voldermorts power is broken whether Harry survives or not.
With this in mind, this is why Harry must be the one to confront Voldermort, the proverbial ‘sacrificial lamb’. Moody or Kingsley would not be able to carry out this final act, as they did not host Horcruxes.
And secondly, it has to be noted that the only reason Dumbledore permitted Harry to include Ron and Hermione in the plan was that they had proven themselves trustworthy (‘?’ ??? ?). The plan had to be confined to a small group, because were it to be revealed, Voldermort could easily foil the plans. This explains why Harry (who we already have proven must be an integral part of the plan), could not enlist the entire Order to help destroy Horcruxes, as it would mean that only one person had to be broken for the plan to fail.
And perhaps thirdly, it could be that Dumbledore was playing on Voldermort’s arrogance, entrusting the most important task to three teenagers, and allowing him to focus his efforts on tracking down the Order, and not see Harry as a real threat until it’s too late.
These reasons are not mutually exclusive, and to sum up, the key seems to be that only a carefully nurtured, guided (by Snape too) and determined Harry, confident that the alone is the answer, can bring about the desired conclusion, as explained above, of a final sacrifice bringing about the true downfall of Voldermort.