/sci/ - Science & Math

Hello anons, I'm a complete retard when it comes to chemistry, its literally magic to me. I recently came across this channel where 18 year old dude built a pyrolysis reactor to melt plastic to get crude oil and natural gas like methane and butane out of it.
So where's the catch? why is this not more widespread? If some 18 year old can build this reactor in his backyard and melt 8 kilo plastic in 2 hours to get oil and gas back, how come its not industrialized