@Richard_Littler I just saw this person in a video
Playing the piano in the most incorrect manner
https://va.media.tumblr.com/tumblr_s2y479BeeF1z7ukda.mp4
[vid description: person playing a piano by plucking the strings, using a bass drum pedal to drum the piano cabinet, etc]
Interesting fact, "doctors" would perform digital manipulations in their clinics to help keep a woman from having hysteria. The first mechanical massagers were created to prevent the clinicians from getting hand cramps while performing their duties.
So yes, being able to do it yourself at home was a big boon.
@Richard_Littler https://archive.org/details/howtowritephotop00zuve/page/n5/mode/2up ← There are two different works (and two editions of the later one) under that title in @internetarchive
All are from the First World War era, but this one's the oldest in the list (and says it's the Third Edition, no less!)