Hmm, I've been going back and forth on what I think in response to this...

On the one hand, I do agree with you that anyone can come up with an unworkable proposal for a solution to any problem.

But on the other hand, most of the good people I've worked with would find it very unsatisfying to put forward an unworkable proposal and may well just be discouraged from reporting the issue at all.

But I think on balance we are probably more in agreement than I thought. I do think it's a useful exercise to encourage people to say "this is a problem, I don't really know how to fix it, my best idea is ____ but I'm not sure that will work because ____".

But I also think it's pretty hard to foster an environment where people of every seniority level feel comfortable doing that.