OP here.
Firstly, I spend most of my time in my current job with writing code and managing servers.
Secondly, not every "IT manager" is an ignorant blowhard who knows nothing about technology. I'd say only 60 to 70 per cent.
Project Management IS important but depending on the size of your project you do not always perceive it as such.
Also: Software Planning is useless? I do not know of your view is based on the terminology (Call it "Architectural Engineering" if you want to) but if you are convinced that thinking through how you are going to build a system in advance is a "useless pseudo-IT skill" maybe you should try a different career? Because starting an IT project by firing up your IDE and starting to write code is not going to lead to success.
You need to differentiate between playing buzzword bingo and actually planning your piece of software (by whatever means).