Sometimes people are talking about a problem because they want sympathy. They just want to know they aren't alone. Suggesting help would be rude.
Sometimes people are talking about a problem because they need advice. They want solutions. Just being like "yeah I have the same problem" would be annoying.
How the hell are people supposed to tell the difference? This is half of why I always feel like an asshole when I respond to anything.
P.S. Solutions & sympathy both appreciated on this post.