In truth, there’s good reasons do doubt every project, even the ones that end up being highly succesfull.
Unfortunately, it seems like human beings are highly pulled towards either working on something with unrealistic confidence, or sitting on the the couch and watching netflix.
Working on something with unrealistic confidence, even if that project itself is completely doomed to failure, is probably better for you than watching Netflix.
The one exception is, there is a higher than average probability that startup people with naive optimism end up getting into a position where they decide to end their life.
But it's not necessary your job either to bring them down.
Just tell them honestly if they take a big risk that you see a risk and why.
I’ve got a bunch of friends in the same boat…Poorly thought out plans become pretty evident with simple questions like “what’s your plan?” Or “do you know how to build that product?”
But idk the other day I had a conversation like this:
Friend: “In a couple years I’ll be making over $1M/yr!”
Me: “How are you gonna do that?”
Friend: “I’ll just make more sales. Why can’t I?”
Some people are just delusional and I change the topic.
If it is obvious that your friends want support, give them that. Unless they are betting their life savings or doing something extremely risky why bring them down.
“Would you like me you think through potential risks and pitfalls, or are you looking for emotional support?”
If they answer the former, go right ahead and challenge them. If the latter then share your hopes for their success. Sometimes they know they have blind spots and they need your help before investing too much effort in the idea, sometimes they just want to share their enthusiasm.
Here's the cool thing, here's the drawback.