Well, mostly because you don't have the years of experience in doing it, pretty much that. Because most of devs live only on their laptops ('works for me' syndrome), without thinking about networking, hardware underlying, OS tuning, security and other things. That's generalization of course, and I am glad you can do it all, I'd wish to have chance working with people like you more, but the reality is that you're an unicorn. Reversing your argument, why can't I do your job? I mean, I've programming skills probably worse than full time developer, but I've did my share or development and I think they're good enough ;) Why 'good enough' should be acceptable when its infrastructure and operations, but not acceptable when its development?

I'd go and look for actual surgeon. Or bite the bullet and try to live my life as it goes, without risking complete failure of both these guys messing with my heart. ;)

Devs that don't think about the environment their code runs in are bad devs. Sadly, this group seems to be large.