Hmm, well could it be because it makes you aware you aren't the only one dealing with it...so you feel less depressed due maybe feeling less alone about it...or i could be totally off on that. But just not sure its a reason to feel guilty....unless its in some kind of sadistic way like 'ha ha ha, look at that sad depressed person....now I feel so much better knowing someone is suffering' but kinda doubting that's the thought process you have.