According to Wikipedia:
A business analyst (BA) is responsible for analyzing the business needs of their clients and stakeholders to help identify business problems and propose solutions.A common activity of business analysts is to document business processes. Business needs typically stem from inefficiencies and problems in these processes. To the extent that your business analysts solely document the processes - as opposed to eliciting and researching them, identifying the inefficiencies and problems within them, and proposing solutions - your BAs have a very tactical role.
There is nothing wrong with such a role, as long as the people performing the more strategic functions are qualified to do so. Be careful about relying on subject matter experts (SMEs). Being experts in a domain doesn't by itself qualify them to analyze business processes and problems.