It's not so much intentional. In theory the whole vanguard party thing inherent to Leninism & derived political philosophies is supposed to precede communism by first establishing a developed socialist society. The communist society is supposed to be stateless. The vanguard party generally becomes a corrupted authoritarian mess and never gets close to the theory defined goal but that is not a defined intent for these political theories. One could say that often enough this is because it fails to retain consistent democratic control, faces external opposition and locks down even internal democratic processes[1]. Marx did however allow for peaceful transition in countries with strong democratic institutional structures. (I believe he mentioned the US, UK and Netherlands.) and I suppose a communist could argue against the likelihood of such regression in such a scenario tho that seems doubtfull imo.

[1]https://en.wikipedia.org/wiki/Dictatorship_of_the_proletaria...