This is true, but it is also true that techie people are normally just sat waiting for someone to break things and between doing things like building and configuring test stations (depending on work), writing reports, doing research and fixing said broken test stations to a deadline they tend to be finding ways of getting around firewalls and the like
Any spare time that I got when I was working as a tech was spent building or fixing computers for friends or out doing bushcraft as an essential means of relaxation.
I love the outdoors, I love working with my hands, I like attention to fine detail and using my grey matter.
I also enjoy learning things and In bushcraft I can do all, but in a more relaxed atmosphere where the only pressure layed upon me is that which I lay upon myself (I don't have a host of managers telling me that we will be losing around £70,000 an hour and who have not an idea of the complexity of finding an intermittent fault).
I think that is the appeal to a lot of the techie types, either that or we just like going out and grubbing around in the undergrowth