Doesn't DuckDuckGo browser give you anonymity though, without needing Tor?
DuckDuckGo doesn't track or store your searches. That's it. That's not the same as actually hiding your web activity. The police/government/nefarious forces can still obtain a record of every search you make through DuckDuckGo if they request it from/demand it from/secretly monitor/hack your internet service provider.
With Tor, that is theoretically not possible. These days, it's highly unlikely that it's completely impossible, but it certainly would be more difficult.
if you can use a VPN for non dark web activities that guarantees privacy- why do people go to the dark web? what is it you can access on the dark web that you cannot access online in the normal route?
It's probably useful in places like China, where personal freedom is restricted and journalists regularly get locked up, etc. Even in the west, whistleblowers, journalists, etc. would benefit from more secure internet browsing and communications. For some people, it's just the principle. It's like that old argument: if you have nothing to hide, why do you care about ID cards and CCTV on every street corner and all that. Some people are totally innocent but are concerned about that stuff anyway. As they are entitled to be!
And yes, there is a larger proportion of illegal activity there – obviously a more secure, hidden environment is going to be more attractive to criminals! And most normal people don't ever need to use it. I know I don't. But people saying "don't go there! it's bad! Logging onto Tor supports terrorists and paedophiles!" etc. show a fundamental misunderstanding of the entire issue. Which is not surprising, since it's kind of complex and the media love to sensationalise it.
The "dark web" is not just something you log onto and instantly access hitmen, drugs, child abuse and terrorism. You still need to know how to find those websites and you still need to actively visit them, just like you do with illegal websites accessible on the normal web via Chrome or Mozilla or whatever.