If you read the history, like the "Invisible Hands" book [2], you'll see that business people started out wanting to reduce their taxes and regulations on their businesses, and then found/funded/promoted libertarian thinkers like Hayek and Von Mises and later Friedman, etc. to create movements that used a libertarian narrative to sell their self-interested goals.
It's no coincidence that the names who funded this DuPonts, Scaifes, Kochs, etc. all got rich from building huge private businesses around fossil fuel and other polluting extractive industries. [3,4]
When I was libertarian, I was authentically so, and later saw the flaws in the arguments which led me to be liberal-democrat/neoliberal, and only recently did I discover this astroturfing history.
[1] Which I was involved in when I was in college.
[2] https://www.amazon.com/Invisible-Hands-Businessmens-Crusade-...
[3] "Sons of Wichita" on the Kochs: https://www.amazon.com/Sons-Wichita-Brothers-Americas-Powerf...
[4] "Dark Money" https://www.amazon.com/Dark-Money-History-Billionaires-Radic...
I used to be a libertarian, then got out of it, but I just thought the Kochs were eccentric libertarians. The truth is actually far worse than that. They aren't just political manipulators, but are truly awful people screwing over everyone who gets in their path including their siblings, government officials, employees, etc.
Here's some further reading:
+ Dark Money: Good overview of general Republican big money politics
https://www.amazon.com/Dark-Money-History-Billionaires-Radic...
+ Sons of Wichita: Koch Brother / family history - it's really crazy how corrupt they are, and it seems to come from Fred Koch really fucking them up as kids. He was like Daniel Plainview + Alex Jones.
https://www.amazon.com/Sons-Wichita-Brothers-Americas-Powerf...
+ Invisible Hands: Some Pre-Koch Republican big money history - essentially worthless heirs to privately owned extractive fortunes (Scaiffes, Mellons, etc.) had full ability to spend their closely-held businesses money on keeping their monopolies and found libertarian thinkers to help publicly justify low taxes / lax regulations.
https://www.amazon.com/Invisible-Hands-Businessmens-Crusade-...