I expect you're receiving downvotes (not from me) because you're introducing a strawman argument.

The issue under investigation is if there was collusion between members of Trump's campaign and foreign operatives to, e.g. time releases or coordinate messaging, not attack the voting apparatus. The fact that the national security advisor lied to the VP about discussions with Russia (for which he was fired) and now will only testify under oath with immunity suggest that there indeed may be something worth investigating there.