You're absolutely right to ask why, and the reasons you give do drive the difficulties here. Although I'm fairly technical, I think I have a fair understanding

You're absolutely right to ask why, and the reasons you give do drive the difficulties here. Although I'm fairly technical, I think I have a fair understanding of those in the non-technical camp due to my background and general experience, but I sense I sometimes expect too much of the average person (not meaning this to sound superior!) Improving bug submission is worth consideration because there's value to be unlocked: the people in need of a solution have insights the developers etc benefit from and they themselves would benefit (one hopes!) from the solution but there's a good chance it could apply for others too. From the little I've read about behavioural science, i suspect that a selection of nudges may help but it could take time and perseverance to get it right. There are little tricks that Github and SO already use to shift things the right way. It's important to base these on how they'd work for target users, as designing them for how people who design such systems or already have well developed problem solving serves no one and will fail! It's also important not to be overly Draconian or pushy (keeping the nudges reasonable) seems important too, and the smartest ones probably lead people on to better submissions as much as block bad ones, the earlier the better (no one wants to fill in some onerous form only to be told off by a computer!)