Wait, like... Are you saying you have an issue with kinks and sex workers because men like those things?
Not to be rude, but it sounds like you just now learned about kinky porn. I gotta tell you, dominatrix, BDSM and sex work have kinda been around for a really long time. Even before the internet became a thing. The only reason why you're seeing it more now is because everyone is locked in their homes, and can't be horny anywhere else, also because the internet makes finding your kink more accessible. Furthermore sex workers still need to pay their bills while staying safe, so OnlyFans is a pretty good resource for them, and not all of the people on there cater to men... actually I would say they cater to whoever gives them business.
I can say there is a deeper psychological meaning to kinks, but not really they theory you're presenting. A while back I read a study on how fetishes can develop from childhood trauma, and with that said I can see how some kind of horrible childhood events can turn a grown man into an... alpha and omega kinkster? A sub in a S&M type of relationship? I do think these examples that heavily rely on alpha and omega hierarchies are dumb, but at the end of the day it's just something specifically for people who are into that sort of thing. I don't think people outside of that fetish will even care, let alone try to apply it to themselves.
You're probably just seeing more alpha/omega stuff because it's becoming a popular type of erotica, and also probably because Lindsay Ellis (a mega popular Youtuber) made a couple videos about a fanfic writer in that fetish group a few months ago. So it probably has more of a spotlight right now than others.
Also I'm with pretty much everyone else here, the only people I've seen pining for the lady in the new RE game have been LGBT+ people, mostly cis ladies. There's something striking about a gorgeous, confident and dominating lady older than 30. If I had sexual and romantic attraction I would probably pine for her too.
ANYWAYS, there's no reason to be scared? It's just a fetish, and I doubt it has much, if any relation to the RE lady since alpha/omega is basically wolf porn. Larger media influencers will probably move on once its popularity dies down, then no one outside of that group will hear about alpha and omega ever again.