Because a lot of tech culture is based upon the idea of sharing things with people, of enabling others, of bringing down barriers, of helping other people reach their potential. This is why open source communities are so prevalent, and even commercial tech offerings are sold to us with these ideals.
And all that is antithetical to many right wing policies, which are often about creating barriers and unneccessary limitations. Like DeSantis's Don't Say Gay laws. Or the defunding of community services like educational institutes. Or placing barriers on voting.