>>88902836Tamaki interviews many vtubers, so it's not out of place for any holo to collab with them regardless of past association
No one actually blatantly said 'hey you've collabed with her before so you should collab again', that's you linking things using your own context
There is a huge difference in implication between someone refusing to collab because of industry conventions, and refusing to collab because they personally dislike the person
If you strip away the first excuse, the latter is all that remains, and it taints both parties.