An STO, or security token offering, is the latest way for half-baked blockchain projects to extract money from unwitting idiots that think absolutely every cryptocurrency will pump or appreciate at some point. Most of these are formed by companies or individuals with little to no experience developing products, and few will achieve the heights they aspire to.
Odds are if you invest in an STO you will get rekt, just as the case is with ICO and IEO investments nowadays.
There is a reason only accredited investors can invest in IPOs in most countries!
That link is actually a link to a blog post article trying to inform people about STOs and what you mentioned regulations around STOs, its not an advertisement. Exactly for the reason you just mentioned, that STOs and investing in general can be dangerous, it is important to get more information about STOs and regulation, which that article tries to give you.
On your point on what an STO is, I disagree, projects could call themselves an STO but in most cases that would not be true, there is a difference between claiming to be an STO and being an actually STO. Therefore having the information to discern what is all required to be an STO, regulations, company and financial registrations, country specific rules like accreditation is very helpful. A project cant just create a token and be an STO, they will have to follow actual rules like with an IPO or any equity offering. So it would be very helpful for someone who isn't aware of those rules to read an article like that to gain more information what they need to look out for to check whether or not a project claiming to be an STO is actually offering securities and following applicable rules and regulations.
I understand your frustration around all of this, due to the history of ICOs and blockchain projects, that is why information is important!