I didn't say that new user are not welcome, I said that people that feel comfortable to handle their computer/OS as a consumer product do not have reason to use Linux.
What is valid for Linux today was valid also twenty years ago, that 1% of user Linux Desktop is the natural percentage of people that do not consider their OS a consumer product and like dirt their hands.
Trying to create selling point to convince people with argument like privacy conscious or security focused is misleading because create false statement like...
Linux is not privacy conscious, as a matter fact Google and Facebook that are heavily involved on the Linux kernel couldn't care less about your privacy. Privacy mostly depend by the fact that the majority of GNU is or was made by volunteers rather than corporations and there is any commercial interest on it hence there is not reason to spy or track the users. However when distros are handled or sponsored by corporation the temptation to track or spy on the user is irresistible, and almost any corps misstep in it like the dash search of Ubuntu Unity with Amazon...
Security focused is not the reason why the Linux kernel was created in first place as well as the GNU operating system, but it is a consequence of the open source model. This is something that ESR pointed out in his book and widely shared more eyes on the code more bugs and issues found and fixed.
I don't really see the connection between new comers and the future of Linux. Being polite and help the others is always a good thing no matter what, but the Linux Desktop is not a commercial product hence there is not any reason why must be easy for anyone to learn or use. However all the newer distros that try to monetize their effort are particular focused on being easy to learn and try to hide the command line as much as possible.
Your statement is contradictory because there will be always people that are natural curious and will learn GNU & Linux whatsoever, based on your statement at this point we should have just 5 nerds using Linux.
Be excellent with each other is an attitude worth to be followed in every place, in the Linux community as well as in the line at the market. But making the life easy for the new comers is nice but hard to pursue.
Respect the RTFM this depends by each individual, I received a lot of RTFM in the Debian Forum as well in the Arch Forum at beginning of my path with GNU/Linux. Mostly inappropriate because asking on a forum is usually my last resort, the fact those people are just gross in front to a computer monitor as well as in the super market. Who cares about them. I read always the manual.
By the way I stopped to convince people to use Linux. You don't need to bring GNU/Linux to the people, people that do not accept thing just because "it is what it is" will find their way by themselves.