I wonder how significant the importance of the long-time/early female employee was in shaping a welcoming culture. It is easy for a group of extremely like mind

I wonder how significant the importance of the long-time/early female employee was in shaping a welcoming culture. It is easy for a group of extremely like minded and homogenous (male) group to start a company and grow to a decent size before any diversity is introduced. It might prove to be a powerful strategy to consciously introduce diversity before most would start thinking about "company culture". (Obviously I don't mean this as something only white male founders should worry about, I think it could be powerful for all young companies)