I've been in tech since the mid-'90s. I would say the culture varies a lot between different employers and even different departments for the same employer. That's true in other sectors, of course - nowhere has a monopoly on dickhead managers. I refused to go for interview with one company because they had one token woman showing on their Web pages with pictures of all their board and senior managers - and I told the recruiter why, but I've no idea if they passed that on.
Certain areas tend to be more male-dominated than others. Systems administration and networks, plus hands-on physical work with hardware and in datacentres are male. Business analysis, project management, UX (user experience) stuff tend to have more women. It's always changing, and new roles appear that don't currently exist. Cybersecurity, big data and AI/AR are big areas currently.
A lot of women in tech have taken less traditional routes, done other things first, and I think that helps bring a broader perspective to things. Far more of my male colleagues did computing at school and at uni, and it's all they have ever worked in. But you don't want everyone to be clones if each other, but to have complementary skills.
One of the benefits of it being male-dominated is that salaries tend to be higher - but there is massive variation in the same role with a city bank or a government organisation, a small or large employer. There can be a lot of perks. It can have flexible hours (I rarely have an issue starting late or finishing early or taking a long lunch or even mid-morning or afternoon medical appointments,
as long as I don't miss meetings and do at least 40 hours a week,) but it can also be intensive, especially approaching project deadlines, and some roles can have a lot of out of hours work or on-call.
Don't forget that women have been in tech from the very start of computing- Ada Lovelace, Grace Hopper, the ENIAC women, Stephanie Shirley, Radia Perlman, Wendy Hall and many others. It's very definitely not all Turing, Gates and Jobs. Men just got more involved as they saw there was money to be made. And as Karen Spärk-Jones said, "Computing is too important to be left to men." That's more true than ever before, because there are increasingly few areas of life which don't involve tech somewhere - it's our past and our future, and we need to be there as much as men.