I was a subelite concert pianist earlier in life. Practice for me was about 3 hours per day serious practice and 2-3 hours per day in rehersals or practicing other instruments. I was slightly talented but not exceptionally gifted naturally. Took around 10 years from age 8 to age 18 to reach subelite and the point of being able to perform a solo program that wasn't blatantly disrespectful to the composers. The first few years were on the lower end and didn't take it seriously into around 12-13.
to have a chance at progressing beyond that I would have had to practice much, much more often. I estimate it would have taken another 6+ hours serious practice per day 7 days a week for another 5 years to eek into the lower end of actual elite.
I have family members who reached that level on other instruments from 5-6 hours serious practice starting age 7-8 through the teen years (and always include another 10-20 hours a week for group rehersals and then any time playing pop music or noodling on top of that). Starting at that age with that focus allowed them to reach elite status considerably faster than an adult. They were able to give serious conerts by late teens in this way.
To reach subelite status as an adult, there is no reason you can't do it. It's not gymnastics or the 100m dash. You can start age 30-40 and become subelite with enough time committment. It's even possible to become elite, although unlikely and probably requires some baseline talent. Requires serious practice for several hours per day. The group performance hours are also not optional.
They are an essential part of developing as a musician. It's a different skillset and training, but absolutely required to perform solo AND in group settings to develop as a musician. Without that is like calling yourself a runner without racing.