If we are discussing in good faith, the parent was probably talking about lobbying done by moneyed interests. Which is not necessary for democracy, itself a very broad term in its initial definition which does not include think tanks, political action comities and privately held mass media.

Wait what? You’re saying groups (think tanks, companies) shouldn’t be able to petition their elected representative as a condition of democracy?

Yes, companies aren't citizens.

Secondly, petitions are one thing, petitions with a hidden $1billion folded up in the middle is a bribe.

Bribes definitely should be illegal.

If I were to call up my senator, I should get the same 'attention' as Elon Musk would get if he were donating a Hospital to their hometown.

If that were true(lobbying is just communicating), people and corporations would write a letter rather than hire a lobbyist.

A letter would work too if bribes are paid.

Lobbing in the US at least I’d typically referring to large institutions , not citizens. The elimination of lobbying in the US is most often reference to the Citizens United ruling by the Supreme Court.

We want to ban large institutions from communicating with their elected representative?

Huh? I communicate with people every day without giving them money. We want ban large institutions from paying elected officials. Genuinely unsure if you are trolling or not.

Why wouldn't we?

The elected representatives represent Human citizens not Corporations.

Companies are not people.

You could compare it to a messaging protocol. If the message is attempting remote code execution you would want to remove the possibility to do so and/or [perhaps] drop the message.