There are four kinds of investors:
Those that know your business and know that they know your business. They are sources of wisdom. Use them.
Those that know your business but act as if they do not know your business by being hands-off. They are sleeping partnerships. Awaken them and extract value.
Those that do not know your business and know that they do not know your business so are hands-off. They are helpful in other ways and can be great support.
Those that do not know your business and do not know that they do not know your business. They will impose their will upon the business and destroy value. Shun them.