I used to work one of the top 1000 visited websites, and we have massive bot issues where 60% of our traffic was bots and had to implement solutions similar to cloudflare to reduce the bots. Also, with the raise of ai, it's become even more important since a lot of ai data scraping companies do not respect robots.
Do you really want to implement http, ssl and tls; all by your self, what about security hash algorithms? Re inventing the wheel means you also get to go through all the bugs and s purity issue that these open source libraries went through. This is a type of opinion I would expect some one with no understanding about security saying.
If you're building an application that depends heavily on networking for either its performance or reliability, then yes, you are better off rewriting those components and taking on ownership of hardening them to satisfy your requirements than you are relying on someone else that doesn't know your use case and has no incentive to making it work well making sure it works well for you.
HTTP is fairly trivial as well; if you're afraid of little things like that, you'll never deliver best-in-class software.
Assuming you do have enough understanding of secure programming, you can actually forgo most dependencies if you really want. You can ignore most edge cases which have to be implemented if you exactly follow the standard (e.g. HTTP parsing rules), supporting only one ciphersuite that is known to be safe and widely used, and so on. Of course that still doesn't justify the use of assembly.
You do know a router requires a public IP to even work you cannot not have a public IP. Either the people who rite those rules have no idea about computers or you miss read something.
Lol my company is paying a fortune to get off oracle. Anyone that does not need the million features that come with a oracle will eventually move off it. It's way too expensive to use in smaller environments or non mainframe environment's. Oracle has some of the worst pricing and sales techniques.
Once the news agencies find out you are siphoning their stories they will contact you to set up contracts I would imagine that you are getting them for free for now. That is a big cost which is why in your space bloomberg and Refinitiv charge a premium for this kind of feature and they pay their sources based on royalties.
Most stock market news comes from publicly available press releases, earnings call transcripts and 8k filings, I doubt they need to steal stories from news agencies.