I can't think of many historical examples where something was already illegal when it was invented for no good reason. Can you? Maybe pharma fits that category, but no rational person would argue drugs should be legal by default...
"For no good reason" is carrying a lot of water here. But because the legality is in question, all the examples you are going to get are things that are debatably legal, rather than outright illegal, like Uber. Or things that were intended to be illegal but legal via loopholes, like FedEx.
> no rational person would argue drugs should be legal by default
Plenty of rational people would, in fact, argue that.
Whatever someone feels about recreational drugs, there's a huge difference between freedom to put drugs in your body vs. freedom to advertise drugs for a medical purpose.
The former is (consistent with my argument) legal by default. The latter is not.
What if it's illegal for a good societal reason, and lobbying is just throwing enough money at enough of the right people until they succumb and legalise it?
It's never going to be cut and dried 'a good thing'. In some instances it will be and some it won't.
I'm not yet convinced of the above, but my trajectory points that way.