The 10,000 hour rule.
In one book about success, the author says that to become an expert in any field, you need to spend 10,000 hours on it.
10,000 hours is more than ten years of practicing three hours a day or twenty hours a week.
In our company, which includes international activities in the construction sector, we have both specialists and professionals. The fundamental difference between a specialist in his field and a professional is the "baggage" of accumulated theoretical and practical knowledge.
The accumulated combination of theoretical and practical knowledge contributes not only to high-quality work, but also to the ability to think critically and quickly navigate various situations, even if they are problematic.

Depth of accumulated knowledge
A professional is interested not only in his own, but also in related and surrounding areas, so he is characterized by flexibility and easier adaptation to various situations.

By how successful we are to date, society judges trust.