Poll with comments: skill tree.

Based on the description, the program seems to be just a database of skill trees, which can be compiled without it.

For example, if Kreg is offered diplomacy on the first level, this strictly determines the skill tree number (because it's the only one like that).

This is based on the description. But based on my experience using it, I can say that it's not just a database.
Here's how to prevent something – you can't do without Baratorch.

Message from Dirty_Player
As for my attitude towards this program, I don't see any problems with viewing 255 skill trees. If the program showed the current tree immediately, I don't think there would even be such a question.

Either we're talking about different programs, or you don't know everything about the program's capabilities.
In general, I think it's time to clarify things; you can't hide something forever. The Oracle calculates the current skill trees for all heroes on the map, including those of opponents, and even after acquiring skills. It works online. I'm not sure, but I think you can calculate the skill progression of an opponent's heroes; you can definitely catch the desired skill, avoid unnecessary ones, time wisdom for Pandora, and so on.