That's not really a good excuse, since the PDF is made from a source document that could be repurposed to be more web-friendly if they were willing to make a small amount of extra effort.
Even with a service like Squarespace, asking a restaurant owner to create a well-formatted digital version of the menu and keep it up to date with any revisions is a big enough ask that they can't be assed.
Having visually impaired friends who aren't well served by a PDF that doesn't respect their text size preferences and requires zooming way in and scrolling side to side to read each line, I wish that weren't the case. But that's where we're at.
My guess is the problem is more that there are too many such systems in use. So unifying the process to make a paper and web change requires updating a thousand different solutions.
Even with a service like Squarespace, asking a restaurant owner to create a well-formatted digital version of the menu and keep it up to date with any revisions is a big enough ask that they can't be assed.
Having visually impaired friends who aren't well served by a PDF that doesn't respect their text size preferences and requires zooming way in and scrolling side to side to read each line, I wish that weren't the case. But that's where we're at.