Re: DMARC prevents spoofing
Then those users would have to come up with some new processes, clearly.
One of Gmail's key selling points is its spam filtering. That's nice and all, but it puts Google in an ambivalent position. They have an active disincentive to fight spam, because every spam message people see is a reminder of how much better they are than the competition in this important area.
Adopting actual standards is no part of their plan. Google didn't get where it is today by doing things the same way as everyone else.