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because in the tournament, two equally valid programs are used, so if one doesn't work, the other might, but you don't even have the second program installed.
The list of programs for connecting is not strictly regulated, so it's impossible to make decisions based on this.
As I understand it, there are very few cases of disconnection due to technical reasons, so there's no need to create rules about it; those who are too lazy to figure it out simply agree to a draw.