Would e-commerce have evolved without JeffB or smartphones be invented without Apple? Probably, but it might have taken longer, or they might have been invented in another country, greatly hurting America’s prospects. To this date Amazon has the best e-commerce logistics on the planet.
Doing things ahead of its time, by gathering the right people and enough money, is a very unique skill. Couple that with being well positioned for a certain “inevitable” innovation and that limits the number of people even more.
There’s also a compounding effect. Walking backwards from humanity’s global tech maxima, if every key innovation was late by a few years, the overall maxima might be late by hundreds of years, maybe worse. Maybe humanity ends due to an asteroid impact because we didn't get advanced enough to protect ourselves in time.