That has nothing to do with mobile vs desktop. That has to do with idiot web designer vs non-idiot web designer. The ones who are designing their web pages around specific resolutions ought to be given a shovel and directed to the careers they're best suited for ("sanitation engineer" and/or "ditch digger"). Those are the category of web designer that ruined the web (them, and the ones who design web pages for a specific set of browsers, and no others; though, typically these two groups of miscreants heavily overlap).

Admittedly there are minimum and maximum scaling possibilities for a given set of screen widgets, but they have no business telling me what my browser size should be -- they should be fitting their page into my browser, no matter what size I have it set for, and asking me politely to change my browser size when I'm a less than their minimum.

(few things annoy me more quickly, in browsing the web, than a web page that resizes my browser, and a web browser that doesn't allow me to turn that off)