The internet has made information readily accessible. Your advisor is no longer “an insider” privy to any “hot tips” or ideas which are not already public.
However the sheer amount information is hard to digest and sort. Advisor’s experience and knowledge of your background should serve as a filter, separating noise from signal and distilling only the timeliest information which is useful and relevant to you personally.
You should work with advisor for the same reason you buy your coffee at a coffee shop, instead f growing, harvesting and roasting the coffee beans yourself. Your time is valuable and is better spent doing your work or with your family, letting a specialist do his job ( a concept economists call a “comparative advantage”). As long as advisors’ fee do not exceed the value he or she consistently provides, paying them to handle your affairs competently should not be a hard decision.