The problem I have with this line of reasoning is, you can easily market your product towards male customers while also representing/marketing towards groups who don't fit the caucasian male demographic. Hell, most marketing panels would probably look at me and assume that I want to see caucasian, brunette, male protagonists because that's what I look like. But historically, these ads have been a turn off for me. Not because I'm some PC obsessed lunatic, but because I thought that they were showing me the character I was locked into playing as because, surely if you were able to customize and create your own character, they would show that in a trailer. I didn't want to be the Dovahkiin they were showcasing in Skyrim's trailers, and so it gave me pause regarding buying the game.
It wasn't until a while after seeing Skyrim's trailers and promotional artwork that I learned you could play as women, mer, and beast folk. Hell, I was originally unaware that changing your armor was going to be allowed to be a thing until I heard Todd Howard talking about it. He was talking about character customization like it was something they were really proud of at their studio, their whole idea of "Be whoever you want, do whatever you want" that he felt was a huge part of what defined a Bethesda game, yet wasn't represented at all in the trailers, advertisemants, and gameplay footage I had seen. I had to go out of my way to find out about a key feature that helped seal the deal regarding me buying the game that was also, apparently, a key feature in the minds of the game designers.
From a marketing perspective, that's insane.
And keep in mind that I am almost squarely in the game's target audience, with the biggest line of separation being I'm a light skinned hispanic rather than just "white."
And really, how much time would it take? A few minutes in the character creation menu if they're using in game footage and suddenly you have a new protagonist to showcase. Posters and artwork would take longer, but probably not so long that it wouldn't be worth their while.
Similarly, the reveal of Mr. 111 in the trailer svcks a lot of enthusiasm out of me, particularly because I feel, regardless of whether or not we get to play as other races and genders, if a canonical voice is riveted to the character this time around, character customization has been dealt a critical blow. I'm less excited for Bethesda's E3 stuff, and more anxious, because I'm worried that they're... whatever you want to call it enough to smother the stuff I liked about their games. Hopefully, they haven't, but if they haven't, it's still indicative of a major problem: Their trailer was likely made with the idea of reaching a large demographic that includes me, with the desire of getting me hyped and pumped up, and it's mostly had the opposite effect.