From your post, it would seem that you believe that Google is marketing to other Android users when, I beg to differ. There's not benefit to Google or Android to take money our of their left pocket and put it in the right pocket. In other words they aren't try to compete against other Android OEM's. You won't find one marketing piece, interview or company press release that says otherwise.
Google markets to current iOS users. You know, the ones with the 2GB and 3GB of RAM phones. This idea that there is some connection between how much RAM is in a phone as a measurement of being flagship worthy or not, when there are flagship devices without 6GB of RAM makes no logical sense.
See Above.
No doubt Google wants to capture iOS users, but is this really the best way? To try to match the lower specs of the iPhone? That doesn't make any sense to me. I'm confident Google can cater to both iOS users who don't care about specs and others who do.
Also, when apps start refreshing, what's the explanation to iOS users then? There are plenty of iPhone stories about Safari being unable to keep more tabs open due to limited RAM, etc. If Google really wants to entice iOS users away, why not offer a better guarantee that the software won't run into walls like that? I asked this question before, why should Google lower the bar to match the iPhone? Why are they going for "good enough?" And why are we defending it?
As a fellow Android, Pixel, and Google fan, I don't follow this line of thought. I rather have Google compete better. This speaks to more than just RAM. That is to say, no one is saying RAM is the only thing that makes a device flagship worthy.
If Google really wanted to capture iOS users, they could be doing better in hardware design, they could have kept the headphone jack, they could have kept wireless charging and face unlock from the Nexus-days, include USB-C earphones instead of nothing in the box, and more. They are finally rectifying some of these.
The bottomline is, we should hold Google to higher standards, not lower.