We have groups of experts that advise lawmakers. For example, institutions that advise lawmakers on public health - currently headed by world class health expert RFK Jr.

Point being, it's impossible to build incorruptible institutions, groups of experts, etc, but we need them nonetheless.

Lobbying in it's most basic form is simply the act of petitioning politicians that represent you, which is pretty essential in a democracy.

If you've ever called your Senator or representative to tell them you oppose a law that will negatively impact you - you've just done a little lobbying