Here we go again
Once again an arrogant software developer decides it must dictate how we, its users, operate. Why should they be responsible for our "security"? Surely it's up to us. If I want to use an aged and (supposedly) insecure browser, that's entirely my business, and I might have a very good reason to do so, even if it's beyond the comprehension of the vendors.
I suspect however that keeping us attuned to churn is a more significant motivation than nannying our security, as the entire industry relies on forced obsolescence to stay in business and the open source community is increasingly infected by the same mind set.