Here’s a phenomenon that would be strange, and strongly suggestive that something systematic, not random, was happening: if TCs and summonses always generated different heroes.
Here’s another phenomenon that would be strange, and strongly suggestive that something systematic, not random, was happening: if TCs and summonses always generated the same heroes.
Happily, we don’t see either of these things, so we don’t have any strongly suggestive evidence that something systematic, not random, is happening.
Do we see the same heroes emerging from TCs and summons more than we would expect? I don’t know. To figure that out, we’d need to know two things:
How often would we expect to see the same heroes emerging from TCs and summonses? (This is calculable, probably using just data you can find on the forum. It might be a bit messy and won’t be precise, but one would be able to get a good idea of the expected frequency, if one could be bothered making the effort.)
How often do the same heroes actually appear from TCs and summonses? (A person would just need to log their results for a while to collect this info, though a big sample, collected by multiple players, would be desirable.)
Without doing that work, all this stuff is just a bit fuzzy. Do I feel like duplicates are more common than they should be? What can that feeling possibly be based on, if I haven’t even calculated how common duplicates should be?