IT Pros, accountants, cleaners, caterers, any third-party partner that helps your business. Are they married to just one particular vendor?
For example, your accountant demands you use a specific bookkeeping program so that you can send them files they can work with, and won’t take any other type… Or your IT consultancy pushes for a specific device brand over another similar one.
When they’re incapable or unwilling to provide options, the best to do is look for a different partner.
Well, because their general knowledge of products is limited. Or perhaps there is some hidden reason that benefits them, but not you.
The same way clients request your quotation and perhaps two or more from your competitors, you should have options with your suppliers.