JohnCW The answer to that straightforward question is an indisputable yes.
It indeed is not disputable. The straight forward answer is yes.
Even if somebody does become a virtuoso, it doesn't necessarily mean they have achieved and learned everything 'they' wanted in music, composition, etc.
For example ... they may be hoping to have wanted selected skills of composing or the thinking or feeling or life experience of others, which they haven't been able to acquire ... because everyone is different ... thought processes, brain wiring and processes, physique, environment etc -- all leading to different potentials, even when a group of people from the same baby age were put on the same program -- all will be potentially excellent in their ways, but with differences. Some might not be able to do what the other does ----- because of the mental, physique etc etc differences.
So ... appreciating the variety is just great.
If virtuosos are happy with where they are at, then that's excellent. That is good.
And also, I reckon that - as long as piano playing folks are enjoying the (cliche again) 'journey' of piano and music, then that is good. And even if they don't enjoy it - then sure - everybody is different - and it's not compulsory to learn music or play pianos or other musical instruments in the first place. Although - we do know that many kids etc got forced into it, or at least some country or countries were 'encouraging' it - with incentives etc -- in the past that is.
Just because we play music instruments and reached some level - it doesn't mean we're better than anybody that does not play any music instrument or reached any level. Not that anybody said that - but - just mentioning - just in case.
Especially keeping in mind the comment made earlier somewhere - about some under-privileged people living in some parts of the world without enough assistance etc (money etc) - having huge hidden potential, where they could run rings around all of us combined together (in music, piano and other areas) if they are fortunate enough to have the same financial etc opportunities as us.