I don't buy into libertarianism, as I said already I think it's a trojan horse for effective oligarchy.
I'll grant you that many libertarians ignore the dangers of corporate power run amok. Me being working class blue collar, I understand that corporations need to have their power curbed as well and there have to be government agencies powerful enough to put them in check when needed.
So who chooses the government agencies and what stops those government agencies from becoming corrupt tools of the corporate sector?
How about education? Is education to be government funded or will education be fully private and privately funded?
It's a bit like the billionaire who asks a woman at a party "would you sleep with me for a million dollars?" and the woman says "I suppose that I would". So the billionaire asks "would you sleep with me for ten dollars?" and the woman responds "what sort of lady do you think I am?". The billionaire replies "We've already established what sort of woman you are, now we are just haggling over the price".
If you believe in government control over private individuals and entities in some circumstances, and in governments being able to collect some form of tax to pay for that control, then the difference between you and I is the circumstances and form of that government control that we think is justifiable and necessary.