Depression is different for everyone, anon. Some people will have trouble getting out of bed to take a shower, or making a good meal to eat, but costuming is the last thing that gives them joy and keeps them going, so they still do it in some capacity. For lolitas it's even easier because it's all retail therapy.
Cons are once a year events, so people use them as a point in the near future to look forward to and keep themselves going. But yes, some people do get too depressed for cons and cosplay. >>9834750>I've even heard someone use a phrase like "high-functioning depression", which apparently refers to people who are depressed (well, supposedly) and yet are still able to work and function in the world. Very confusing, IMO...
Nah anon, it's a thing. I'd say a lot of people are like this. You feel crippling despair and somehow struggle through it to get out of bed every morning. Some days are worse and dishes, laundry, and things you need to do pile up and you just can't bring yourself to do anything about it. You show up at work looking a little worse for wear (no makeup and wrinkled clothes and huge bags under your eyes) because you can't sleep at night but you manage to get there, even if you are low energy all day. Every day you are preoccupied with thoughts sadness and how much better off the world would be without you, but you keep going anyway because what else will you do?
It's that kind of thing. You often can't even tell someone is depressed because they put on a facade of happiness and only let it slip in private. They might outwardly look like a functioning person but a healthy person wouldn't be dealing with those kinds of negative thoughts and feelings to this extent. It takes tremendous amounts of energy to carry out those same tasks while processing all that negative garbage compared to a healthy person, so it just gets really exhausting.