[wklauss]

> You pay well, but not so much

Don't really see much of a contradiction. A good salary is not necessarily the highest salary.

> You require linear algebra but ok with technical writer.

I'm a tech writer but went to engineering school. While I assume it's not a fairly common situation, it's also not unheard of. The original comment seems to imply that they'll frown upon a candidate that will expect to be taught linear algebra at the workplace but will be ok with one that has only a basic grasp and it's willing to attend engineering school to improve.