The motivation seems to be to avoid single answers to single questions by linking new questions about 'where is the grave of X?' to 'how to find a person's burial place?'?
These are in my opinion different questions ('specific data point' vs 'methodology/howto'. Thus not really 'duplicates'?
This idea seems also motivated due to recent "spate of questions" that had answers ranging between 'easy/quick to find' to 'difficult to find ' and even 'impossible to know'. Well, if an answer was posted…
I see only the 'too easy'/'too basic' questions as problematic. A specific close reason for that already exists. A link to a 'method'-dupe may only be useful for these?
It seems further noteworthy that 'the spate' seems to have been originating from one specific new user. As long as that user keeps the cadence of this type of question at this rather low level (not multiple questions of this type per day!), and the formal question quality raised by nudging the user a bit more towards our quality goals, the problem seems to be more 'boredom of regular —but uninterested— users'? That is 'the problem' could also be phrased 'not enough interesting new questions posted'? A far more widespread and problematic trend…
Note that if there are different problems than 'on-topic but (somehow) disliked questions', then different tactics/solutions should be sought to deal with a possibly problematic specific user, rather than preventing answers to a type of question others have asked (sparingly), and which we allowed without a hinch, and should allow without much second thoughts, especially for 'famous persons'?
Although we might consider marking and discussing the possible overlap with Genealogy on the general topic: "Even more tag cleanup: burials and cemeteries"
A wiki post on 'how to find a burial place' will probably start with banal/trivial internet search way points and strategies, but then mushroom into varied details. I doubt that the 'difficult' question posters for this type will get much satisfaction out of finding such a supposed 'dupe'?
I suppose closing the 'too basic' questions as is, and having a meta-post about methodology linked to in comments might be a better and more eductaional solution than using 'duplicates' to prevent specific answers?