Even the engineer chick I dated did not want to talk about nerdy stuff. Her conversations were about food, gossip, travel, and tv shows instead lol.
If she's talking about food, gossip, travel, and video content, that sounds like an ordinary female in a non-STEM field.
A lot of these guys are introverted to begin with, and sadly, they know women don’t usually share their STEM or other nerdy interests, so they (understandably) talk to women even less than other guys.
Being introverted is a normal thing and it doesn't necessarily make a man worse at seduction. Introverts find their energy is drained from social interaction and would prefer to limit social interaction. Many introverts do not like large group settings either. Social skills matter more than introversion itself. There are introverts that have social skill and make a decent impression. There are also introverts who are not social skills and make an impression of being socially awkward.
That said, certain methods of meeting women are not well suited for introverts.
The four main ways to meet women are:
1. Night game (approaching strangers in bars/nightlife venues)
2. Day game (approaching strangers in non-bar venues)
3. Tech-based (swipe apps and social media DMs. Some 50+ people still use dating websites like Match or OurTime)
4. Social circle (meeting people through an existing social network)
Night game is probably the worst method for introverts for meeting women. From the late 1960s until the mid-2000s, this was the primary way people met strangers for dating purposes when they didn't have an adequate social network. Night game is best for those who are more extroverted and energized by social interaction. In the era before tech-based game existed (before the early 1990s) or became de-stigmatized (early 1990s to mid-2000s), plenty of introverts were trying to approach strangers in nightlife venues. It generally didn't go well for a lot them.
Day game is a good option for introverts that aren't socially awkward. It's more subdued than most nightlife environments and women are isolated from their friends. The biggest challenge in day game is reading social cues. It's less conventional to approach strangers in non-bar venues so it takes a little bit more social calibration.
Tech-based game would seemingly be perfect for introverts. It seems awesome to be able to sit at home and arrange dates. It's never lived up to the hype. For over a decade, it was stigmatized to use tech-based methods. That era has long since passed. Ratios have always been a problem in tech-based game. Men have always far outnumbered women in the use of tech-based methods. Some more recent stats show that 76% of regular Tinder users are male and about 65% of Hinge/Bumble users are male. The odds are not in women's favor and women have big time abundance of options there. Most introverts do not have enough Followers on Instagram to warrant doing Instagram DMs.
Social circle can be effective for a subset of introverts who are socially calibrated and who have enough social connections.
Once an introvert gets a date/some dates from one of these 4 primary methods, how does he keep her attracted long enough to have sex with him? He needs to find a way to connect with her meaningfully. Rationality isn't going to work well. He needs to give her some sort of positive emotional reaction. That can be challenging for some introverts, especially guys with STEM type interests.