Elon has a talk where some kid asked him how to start a hardware company and even Elon went "start an internet company first"
Anyone who says all companies are equally hard are out of their mind
I autismed for a good couple hours and did not find it.
Closest I did find was discussing how he started internet companies in the 90s because the opportunity was right there and much more likely to be impactful than his probabilistic PhD work