A social business or organization presence is a great idea. You can listen to what people say and think and you can get in contact with like-minded groups and/or individuals. This allows you to share your passion, learn from others, and share resources. For many, social media is fun, and not a chore.
The main issue with social media is that it will never be yours. The social network can gather data, change how it publishes, change it’s privacy policies, or any number of things because it belongs to them. They can also fold up and just go away leaving you high and dry and with no presence.
A website, however, is an element on one of the largest networks of all — the world wide web — and you control it. This is the place where you give all those individuals that have clicked on the social media link to your website all the information they are looking for. A place where you control what is published, including all the images, details, and resources you deem necessary to appropriately represent you or your organization/business.
Add your resume, sell your products, impart wisdom, tell the world about your business or organization, but make sure you are in control and that all social media links directly back to your website.