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I would agree in principle, to a certain extent. If we are strictly talking about professional self-development (growth), then I agree that an individual shapes his/her own efforts (which can be also seen as putting forward examples for others) for continous improvement. However, other factors are equaly important in order to achieve the goal - foremost, company's culture and policies and the way the company encourages professional development and continous improvement, management styles, working environment, etc.
Continuous improvement as a management system is achievable only if it becomes a company's doctrine, implemented by all segments of workforce, but most important being a part of company's culture and leadirship doctrines and encouregment - be it on a company's global scale or focused on individuals.