It is at least self-aware on that front: the first page says “Sorry in advance for all the run on sentences and grammar issues, I’m a youtuber not an author haha.”
I imagine writing like this is a deliberate part of both his personal brand and the company culture he is trying to create.
MrBeast videos do not get better if everyone uses perfect spelling and grammar. They get better if people figure out and then execute kind of crass but extravagant “wow” moments.
If it’s deliberate there’s no reason to apologise and follow up with an excuse. Unless you’re trying to shield yourself from criticism you know you deserve and could avoid. That would be dishonest so I’m not going to speculate.
Of course there is a reason. It is part of the act and the meta-culture.
I'm not saying I like Mr Beast or this document, but it seems extremely obvious to me that this document is the way it is very intentionally.
The specific sentence offers relatability and a (perceived) degree of honesty. Stating the obvious isn't always bad — it often builds empathy and connections.
In my opinion, he is not at all trying to shield himself from criticism, he is building a connection with the reader.
He'd still have to work with the editor and review the results; that's at least a couple hours of work. This has a substantially lower EV than managing, networking, producing videos, etc. I'd make the same call.
That shows a total lack of self respect in my opinion. You don't have to be an author to put even the tiniest effort into your writing in a professional letter like that.
Modern culture is very big on self deprecation and not having respect for the tiny details. If you don't hold yourself to standards, you can avoid people dragging you when you fail to live up to them. Better to say "I'm not an author ha ha" and have writing full of flaws, knowing the only people that are going to give you grief about it are people that "take it too seriously", then to try and present a well edited and highly professional piece of text and have a mistake missed in editing become the focal point of a bunch of pedants who want to tear you down for being high and mighty. It's a balancing act to be sure, but that's the current side of the spectrum the culture trends are on.
Know your audience. This seems an intentional affectation.
Like a dude who puts in an hour of work to nail the "just rolled out of bed" look. Whether its a good or bad idea is debatable, but either way its not due to lack of effort.
Define "professional letter". "Chicago manual of style" professional letter or some other, less professional styleguide? Because if it isn't written using the proper styleguide... I'm walking out that door before the first hour on the clock.