how do you know the 'great culture' is for assumedly white dudes (what does that mean even, white dude is not some singular set of human traits)?

I'm female, I've been the first and the only woman on teams. I don't give a crap about it. I do my job and expect my colleagues to do the same.

Any place with crap culture is crap culture for almost everyone, no matter gender-identity or race.

I look for places where the employees are passionate and care about what they're doing. Somewhere where code reviews are neither combative nor do they roll over and let things through. Basically somewhere I'll be working to be better for both me and for my colleagues.

Maybe that's something you could ask about. How are code reviews handled, how are implementation disagreements handled. Ask for stories about the last time something fell over. How do they handle call outs, all those stressful situations that people often like to brag about. How someone brags can tell you if you want to work with them or not.