A visiting professor is not an honorary title
This review doesn't think much of the title:
https://www.salon.com/2015/02/19/americas_visiting_professor_scam_how_colleges_are_watering_down_higher_education/"Once upon a time, the “visiting” title meant something. It signified a certain level of status—you were good enough in your field to leave your own institution and grace another with your presence. You were a specialist and you were talented. Today, however, that is no longer the case.
The entire American higher education system is moving in the same cynical direction, hiring fewer long-term faculty members and more visitors. Accordingly, the “visiting” qualifier is now an empty signifier meant to confuse both students and job seekers. Like its counterparts, “in-residence” or “term,” the visiting title is meant to distinguish contingent faculty members from long-term, tenured colleagues. These suggestive adjectives are meant to mislead, because visiting and in-residence positions are typically one step away from the lowly "adjunct" status in the faculty hierarchy. Visiting professors are affiliated with institutions on a short-term contract, and rarely, despite the grumblings of the labor market, result in transition to a long-term, tenure-track position."
