It happened to me exactly once (and the sample size is big enough) that a date was turned off by me being in tech. It happens. And it happens much more frequently when being in tech is part of your identity, like being actively in politics, or saving the oceans. A strong proposal is likely to cause a strong reaction, sometimes negative.

But while I understand why being "political" may be part of someone's identity, I am more skeptical it is needed for a techie to have "tech" as part of their identity.