Bitcoin is a topic where you need to strain your brain. This is not a topic for everyone. Here earn far not silly people. New technologies, ideas, the future is born here. But on the way to the future there are many obstacles
Plenty of 'clever' people fall victims to scams or misinformation every day, that rule does not apply to just who you class as 'silly' people. Sure people need to strain their brain but newbies need a helping hand. When people visit a particular website they do not expect to find downloads and information related to its competitors.
As long as the bitcoin.com domain name causes issues by deliberately or otherwise passing off Bitcoin Cash as Bitcoin then people will continue to lose money.