I only tried edibles from coffeshops in Amsterdam, and they came with plenty of warnings. Like "eat a quarter first, wait half an hour, see how you feel".
But even if it didn’t, I still struggle to understand what is the problem with taking too much THC once. You’ll have a bad time and next time you’ll have less or none. No real harm, no long term damage, no addiction. Getting drunk on vodka once will not make me more likely to have hard drinks when beer is not available. I will simply have less of the stronger product.
I see, this might be a local difference. I'm in the US, and my experience only applies to the US. This sort of thing matters for longer term users, and especially for people who are addict. The impacts on the endocrine system could be less much less pronounced and the withdrawals less severe.
But even if it didn’t, I still struggle to understand what is the problem with taking too much THC once. You’ll have a bad time and next time you’ll have less or none. No real harm, no long term damage, no addiction. Getting drunk on vodka once will not make me more likely to have hard drinks when beer is not available. I will simply have less of the stronger product.