This would just be a huge source of confusion because it assumes the person looking at a file knows that bleeds exist and have been hidden by the viewing software or not. This is why printer trim marks exist :)
A printer should quote the specs for a job ahead of time (or you should be aware of what print specs you're buying). If the quote says the printer is to produce, say, a thousand posters at the A4 final trim size, they will check (preflight) the file before printing to make sure that the files match the quoted specs. They're not about to print oversize and trim down for free.
Often, a printer will show you a proof of some sort to confirm that the final deliverable looks the way you intend. Sometimes that's a digital PDF, sometimes it's a physical mockup.
If they are printing to a given spec and your file has issues or does not match that spec, they should contact you to say "Hey, this job is not quoted to print oversize and trim down but your file is sized for an A4 sheet with 1/8th inch bleeds. Do you want us to just center the file on the A4 and crop the print design down to what fits within the printable margin? Scale it to fit? Send us a new file?"
I work at a printer and if a customer sends us a file that has bleeds but no printer marks to indicate where the trim lines are, we add them and show the customer a digital proof so they can see where it will trim (and so that everyone can confirm that bleeds are correctly built).
Of course, design customers don't always understand that the bleed is meant to be cutoff. I do freelance design work on the side and if I have a customer that isn't so savvy, I will show them a PDF proof without bleeds exported but then export a separate PDF, with bleeds and trim marks, that I give to the printer.