Yes, Dialects are very important.
Many Singaporeans still thought that speaking English make them
look high class and speaking mandarin or dialects make them look
low class.
I went to China my very 1st time to visit my relatives who stay
in teochew areas.
One thing shock me was that almost 90% of the world products are
produced in China.
The interesting fact is the Owners of the big
manufactoring companies only speak teochews and mandarin is
used only to communicate to other dialect groups from
other part of China.
Lucky I am good in my Teochew so i build repport with them.
If you believe that You will be jobless when your age is there,
and need to find own line of business or go China to find
lobang.... buck up your dialect and mandarin! and then go
China!!