No-one has to answer impossible to answer questions. Trolls tend to get dehumanised. Don't dehumanise someone who's done nothing wrong.
Either way, HS2 is, in a pure socio-economic context, a good first step. However, there's a good reason we don't have already have a couple of high speed lines. One such thing is called an anti-rail protest groups, which are able to command a larger minority than in other countries. Two, the costs of HSR in the UK are perhaps 10x higher than other developed countries. Three, the politicians guide the process rather than politicians who are guided by the professionals.
Furthermore, the next generation of travel threatens to render HS2 useless. The next generation could be faster air travel with innovative security, it could be autonomous road vehicles, the hyperloop or anything else. At the same time, ticket prices on HS2 will be prohibitive, whilst it will be possible to do most things on the internet. Most travellers in the near future will be happy to take an extra 40 minutes on their journey in order to save £50.
To finish off, I will answer The Ham's question: Install cab signalling, give the current line a top speed of 140mph (which the Pendolinos are capable of) and add a few extra tracks. It's cheaper than HS2 and has a similar effect. To finish off, HS2 will end up being £60 billion+. What choice do we have but to cancel it?