I've read several posts on this forum by you that have resulted in improvements in my playing.
Reading allows us to make use of other peoples experience to guide our own development.
I don't think anyone would claim to be able to play better without playing, but there are certainly
more and less efficient ways of spending your practice time.
I am both touched and thrilled that you have made improvements based upon reading my posts!
I agree with what you have said about more and less efficient ways of spending practice time.
I haven't read too too many books on the subject of piano-playing, as I'm always a bit more interested in developing my own point of view than in allowing my own point of view to be influenced by others.
However, I will admit that my practicing methods have changed slightly since I read the book
'Piano Technique' by Walter Gieseking and his teacher, Karl Leimer.
The book makes for a very short read (great in terms of value-for-time-investment!)
but contains some incredible information about practicing that many folks would benefit from.