I know that I shall never become a professor. The UK higher education system sets a range of tests for that title, and I do not meet several of them. That is quite all right.
I have deep respect for those who do earn it. Most professors are bright, committed people who have spent years teaching, researching, publishing and helping students to grasp their field. A small number are privileged, vain and almost heroic in their capacity for self-regard. Even they, though, have usually made some real contribution to knowledge.
The title therefore means something. It is not a decorative word to bolt onto a business name because “Mister Windows” lacked the required academic weight.
I accept that fitting double glazing may demand skill, care and sound judgement. I remain less certain that it marks the holder as a senior scholar of fenestration.
Still, perhaps Professor Windows has an extensive publication record. I look forward to his inaugural lecture: Towards a Unified Theory of the Casement.