Mainly because the strength is not enough. Secondly, when playing the piano, your fingers should be clean and tidy, and you can't scratch the keys or anything. It may also be because the force is not in the right place, so you must use your fingers to exert force.

These are my feelings. I have played the electronic organ for 14 years this year. In February this year, I passed Grade 9 and changed the piano to Grade 10. Now I have changed it.