I was trying to make the point that there is no Good and Bad baked into the universe. There is no meaning to those words inherent to the universe - they are not like positive charge and negative charge.
IMO what people generally mean when they say a person is "good" is the person makes decisions based on what is beneficial to society at large, while a "bad" person makes decisions based solely on what benefits them. The idea of Good and Bad, the idea you can judge someone as either Good or Bad, these are ideas which have arisen under evolutionary pressure, it's a mechanism whereby you can enforce a particular behaviour across a community.
There's nothing magic about it. If a person is good, they help make their community stronger: if they are bad, they weaken it. People raised in a traditional religious household seem to cling on to the misplaced idea that there is an absolute Good and an absolute Bad sewn into the fabric of the universe.
However, there is a way to determine more rigourously what actions are good and what are bad. It requires clear thinking, objective appraisal of the situation, and an unbiased enumeration of the choices available. Then you can hope to come to a realistic assessment of each choice, and finally make your decision.
You won't be certain, you shouldn't be certain. You should be aware of the limitations of your understanding, and always ready to adapt to new information. And you certainly will not be influenced by what you might imagine the Devil would make of it all.
Definitely not, lol. Nearby countries with fast rail - France, Spain, Germany - would perhaps give a slight bemused smile in the direction of HS2. Those are big countries where high-speed rail makes actual sense - as just one example, from the German town of Karlsruhe right by the border with France, you can take a TGV to Lyon, about 350 miles away. It takes around 5 hours and will probably cost you less than €100.
However all those countries are all too familiar with their own governments mismanaging public works. So they wouldn't be shocked at the huge sacks of cash that are being tipped into great holes in the ground, and any laughter would be at the idea that this ridiculously unnecessary governmental vanity project is even being built at all.