It is important that there be rules to keep things transparent but lobbying is not a problem in itself.
A simplistic example might be: Let's say that a group calls for a ban on all vehicles then it is right for groups relying on vehicles to make their voice heard to explain what the negative impact would be. Once government and parliament have heard all sides then they can make up their mind. If whole groups are banned from expressing their point of view and from defending their interests then it is no longer a democratic free society.
Interference by foreign powers is a different thing altogether.
Calls to ban lobbying are the usual "slippery slope" that leads to authoritarianism.