It simply does not make sense. If I am a "salesman", does that mean the donor is a "consumer"? If so, what exactly is the person consuming?
Consumer behavior is founded on the intersection of private desire and private benefit. Whereas donor behavior is founded on the intersection of private desire and public benefit. (Frumkin, Peter The Essence of Strategic Giving: A Practical Guide for Donors and Fundraisers
Yes, fundraisers co-opt the vocabulary and techniques of other industries (often because professional development officers come from other industries - we are a new professional class). In my work I regularly deal with lawyers, accountants, and financial planners. To make myself heard, I use their language. But vocabulary alone does not make me an attorney or CPA.
A lot of this confusion stems from the fact that most professional fundraisers don't have a formal education in fundraising/philanthropy. Many of my former and current colleagues have "learned on the job". Myself included. That's not necessarily a bad thing, but it means that as we learn we lean on what we know or what we see. For many, that means borrowing heavily from established sectors, such as sales.
So, we can easily imagine a major gifts officer, with little formal professional training looking to the world of sales as a model of success and co-opting its language and approach. The risk here is that as the major gift officer co-opts from sales, s/he can no longer distinguish between sales and fundraising.
The lesson here is simply that we need to stop comparing ourselves to established fields that appear similar, and focus instead on establishing our own field.