This is also an extremely difficult way to learn Morse code. No one that actually knows Morse code will ever use a chart like this in their thinking and listening pattern.
You’re right, and your post needs to be seen more. Learn Morse audibly, not visually. Whenever I see someone post about these charts it instantly tells me that they don’t actually use Morse.
Learning Morse visually means you have to decode it with more steps:
hear code --> visualise the sound --> decode to letter
Decoding by ear is the fastest way, and is the way that Morse operators decode it (eventually you just hear words).
hear code --> decode to letter.
Here is a useful website for learning Morse code: https://lcwo.net/
There’s also Morse Trainer on f-droid for those that are app inclined.