Among my friends, it was the opposite. I have two close male friends who, like me, were obsessed with computers for at least 20 years. In both cases, their parents bought computers for their sisters, not them. Their parents encouraged their sisters to get into computers, but it was the guys who became obsessed with computers and programming, having never particularly been encouraged to do so.
Thats notable. I can see the opposite is true among my friends who are younger, the girls got laptops because they need to socialise (and privately). Boys use the family computer placed in a communal area for fear they were going to watch porn I suppose. But I'm older and when I was young the Internet was not entirely common. Computers were not ubiquitous and those who worked with them were considered sub-human. I can understand a parent not wanting their child to be a "loser" and I believe it cuts over gendered lines.
I frankly find this setup quite unfair too, but don't see it around me being repeated. Not just because of boy access to private chat, but because of assumption parents openly makes about him. "You would mostly watched porn" is terrible message to the kid. I am also trying to teach my kids that computers are for more then just socializing and porn and show them productive things and puzzlers and such.
Is that part of your answer?
Nevertheless, among my friends, parents agains boy doing computing were practically nonexistent. Computer was usually in boy room and boys were heavily praised for every tiny thing they knew and expected to deal. Their sisters largely aware that it is for boys and not expected of anything (not in my familly I found out only much later).
Note that my parents seen spending much time with computer as waste of time and were systematically attempting to send me out - but they did not seen it boyish nor seen me fundamentally incapable to master it. I had reasonable access to computer and to some books that were in household.