There is usually something you can learn from everyone, but particular circumstances play a big role, and most of the advice is probably not applicable to your exact situation.

The best founders listen and read to everyone, and then ignore everybody and make up their own mind.

Examine everything. Have your own point of view, and use your internal model to process the new information that you receive.

The purpose of advice is to provide anecdotes that help you to connect situations to knowledge.