Yes. There are a couple of sides to this. I can't help but like and be intrigued by a completely unfiltered message from the President. It has a sort of authenticity that crafted, carefully vetted messages definitely do not.
On the other hand, it's kind of nice when people use correct spelling and grammar, particularly if the message is very important.
I see this in business all the time. There's something cringy about a business making social media posts or ads with all caps, misspellings, grammatical mistakes, and very sloppy selection or editing of pictures and graphics. I guess you know that the posts are authentic, probably made by the business owner who lacks time, expertise, or special staff to create the content. So there's that.
But I think it really pays to consider well your audience and many other things when you're putting out public statements or ads or information. I'd like to reach people who appreciate a good product or a job well done, and those people might notice if I'm careless about all this sort of thing. But the fact is some people don't really care I guess, and badly done websites or emails or social media posts don't really matter. You do you, as they say. It's a free country.