I even think referring to 'techies' as 'techies' is a bit disparaging - of course, ther are, collectively, the 'technical' team. But, really, 'techie' is a theatre term (if it's anything), and representative of the fact that the 'technical' side of the show is traditionally considered to be secondary to the performance - possibly quite rightly, as ,ultimately, good stage acting should be able to command attention without any extensive contribution from fancy lighting states, SFX and so on - there is nothing more important in 'real time' than the connection between the actor and the audience. The 'techs', from the stage perspective (unless you are one of those thousand pound West End shows in which more care is taken over the hydraulics than the performances...ahem!) exist as 'engineers', in effect, who are enhancing what the actors are doing. Which is not to say that their vital contributions to a show shouldn't be acknowledged, but does explain, I think, why they are often considered 'peripheral' figures in a stage production, by the performers (and sometimes, more worringly, the directors!).
On a film set, though, the 'techs' are the 'crew', and the fact that that makes them sound like a unified brotherhood who are steering the film to completion through their collective efforts is about right. They all have their place within their own teams; they all have their allocated hierarchy; they are all proud to say that they have worked their way to becoming a 'gaffer' or a 'focus puller' or a 'key grip' or a 'sparks'; they will spend more time in the company of the director than you ever will, unless you are Tom Cruise, and be treated with greater solicitude. In short, it's really their set, not yours, and I think it's important that every actor who works in film respects that fact... and the amount of work that the crew have to put in in order to make everything you do look suitably good for broadcast.