Most public speaking relevant to technology is reading slides. Not exactly an awe-inspiring task.
And some other kinds of public speaking (e.g. Trump’s or Biden’s speeches) are so bad that I sincerely believe any moderately intelligent person should be able to do better.
Technical blogger videos are not public speaking - there is plenty of editing.
Learning how to communicate well, will serve you well no matter what industry you're in.
Knowing how to sell will serve you well, and also solve problems for LOTS of businesses.
Being a good human involves a hell of a lot more than just technology.
We'd do ourselves well to get out of our collective tech bubble. There's a MUCH larger world out there than just we see on the screen.
It seems as if there is perhaps a narrow-minded view here that assumes technological skills are the only ones worthwhile.
Nothing could be further from the truth.
ESPECIALLY in this era where folks are so paranoid about AI replacing people/jobs.
Being more human will win. Those are skills absolutely worth investing in.