But all of this goes just as much when a lack of typing skills is the constant bottleneck. If you can't type at the speed of thought, the quality and complexity of your thoughts suffer since a part of your working memory is consumed by the process of typing. This has real implications for what you're able to accomplish.
Your medium of expression also influences the speed of your thought. You'll notice that people who speak for a living seem to be wittier than those who don't; they're able to form thoughts and translate them into expression very quickly. Typing/writing is already much slower than speaking, but its advantage is the ability to revise a thought before conveying it. If you're typing slowly, you're probably forming thoughts slower than someone who types quickly. Anecdotally, spending so much of my time communicating via keyboard stunted the development of my ability to express vocally, because it lowered the rate at which I had to generate and, internally revise, and expel thoughts. It would be even worse if I could not touch type.
That's my layman's take, anyway.
The touchscreens of today make touch typing impossible.
Also, with my laptop and its cramped, wretched keyboard, I use a full size bluetooth one (they are surprisingly hard to find) to touchtype on. I hate how every keyboard maker has to "innovate" by moving all the non-Qwerty keys around randomly.
I'm wondering if you have very specific muscle memory outputs for your fingers vs. an intuition of where each key is relative to each other. E.g., I'm typing this sentence with only my pointer and middle finger on my right hand. Would that cause a problem for you?
I took a 2 week typing class in the summer after 8th grade. We learned on big heavy mechanical typewriters where you really had to hammer the key to get an impression. It was time well spent, as it has paid off for me continuously ever since. For example, I wrote this entirely with touch typing (not looking at the keyboard).