Yes or No, do practices help players get better?
Yes....and no.
It depends on the kind of practice. If it is mindful, then yes.
Golfers don't get better by going out, hitting 18 and comparing their score from the day before.
They go out and hit a bucket from 100 yards from a downhill lie in the rough. Then a bucket from a downhill lie in the rough from 90 yards. Then 80. Then 75. Then they putt for 3 hours.
And they will only get better if they are constantly evaluating and adjusting each swing.
There is no such thing as talent.
Talent requires access to instruction, desire to excel at a given skill, and repetitive mindful practice....10,000 hours of it, some say.
So yeah. Additional practice, with good coaches....should deliver.
I'm a semi industrial musician. I'm not a professional. Sometimes I get paid. I lead a band that competes regularly in music contests.
Supervised practice is almost a guaranteed way to get better.