It's been my experience that engineers are quite poor at judging the "patentability" of ideas. I'm not saying that you're wrong, just that the patent field is quite opaque and difficult to understand, which is why patent lawyers do quite well.
Well, there's legal and there's right. They are not not always the same.
https://en.wikipedia.org/wiki/Person_having_ordinary_skill_i...
Based on the above phrase you could almost be forgiven for thinking somethings "patentability" would actually be defined by how engineers typically judged it, rather than how specialist lawyers judge it.