I am one of the editors who always adds a disambiguation comment to Artist entries when I create them, and often when I edit them. Why? Most of the Releases I add are for local, modern, classical music, by Artists who are not (yet?) well known.
In that context, I think this is not the correct test for whether a disambiguation string is needed:
I see these Artist entries as search results when typing a name into an Album Artist or Track Artist or Artist Relationship field. These results show only name and disambiguation string. It is really valuable to know from the visible result that the entry either is or is not the Artist which I want to use.
It is possible to click on links in search results, opening an extra tab with the main Artist page for each possible match, but it is much slower.
I encounter fairly often the case where I am entering an Artist with a fairly common name, and find out that there is already another, minimal Artist entry in the database, for a different person. And fairly often, the other entry has no bio, no link to a home page, few Relationships, only a Track Artist mention for a performance on one Release once. It can be hard to tell if a minimal entry like this is or is not for the person I seek. A good disambiguation string really helps.
Yes, the disambiguation comment is not localiseable. Yes, it is a problem. I think of this as one of many ways the MB system forces editors to use English when editing. The answer is to improve the system, not to stop using one of the system’s very useful tools.