There are two reasons why you've only got the one definitive answer from Stealthie just so you know:
1. The Miner's tool doesn't include tritium, so people can't just look up 15 systems full of overlapping hotspots and link them for you like they can with painite, LTDs etc.
2. Most people are only concerned with speed and it's faster to use the miners tool to mine something else that is worth credits and then use them to buy your tritium.
I get that you want to go mining but the fact is very few people in the bubble can be bothered and that's just how it is.
And, of course, the fact that people might want to keep a good source of Tritium to themselves, to avoid depleting it and to avoid the possibility of Fdev nerfing it.
Which is fine.
Anybody who plays ED should understand that there are some specific things that people are likely to want to keep to themselves.