If there really is effective agreement in the Iranian OSM community, there is no problem. However, it came across that you wanted to do this on your own initiative, and you didn’t react to previous hints that you would need community agreement.
As one reason for not changing might be that the difficulties of entering new data in the correct format still exist, I think you also need to also take steps to make initial data entry easier.
I’d also note that you need to change ref ((e.g the M1 motorway in England is not name=M1, but rather ref=M1), addr:housenumber, and possibly postal code numbers, as well as name and name:fa. In the UK, at least, numbers rarely appear in road names, even though it is common in the USA, although they are normally spelled out, there (i.e. Fifth Avenue, not 5th Avenue. I actually wonder if many of these roads with numbers should really be ref=, or whether you are actually talking about ref=, not name=. This is a, random, example of the appropriate use of ref=, with a number, for a road in Iran, where you might want to convert it to the Arabic glyphs: https://www.openstreetmap.org/way/178143619.
On the other hand, here is an another random example, where it might have been inappropriate to mechanically convert any numerals (there aren’t any in this case): https://www.openstreetmap.org/way/196565437. In this case it might be appropriate to add a map note or fixme, requesting someone local to it to check whether it really was only signed in English, and if not, to relegate the existing name to name:en, and replace it with the name that actually appears on the local signs.
Doing the bulk edit should be fairly easy for someone with a computer programming background, and I would hope there are people with that background in the Iranian mapping community. I’d suggest, rather than doing it yourself, you should try and enlist their support. I imagine a JOSM plugin should be fairly easy for a programmer, but I haven’t looked into that in any detail. iD may be more difficult, as I doubt that it is designed to be customisable.