Irrespective of whether one is building a potentially billion dollar business or 'only' a 10m lifestyle company, the goal and focus should still be on the usefulness of the product and fitting market need, and not 'disrupting an industry' with the product as a side goal - if it's the latter, it indicates the priorities are skewed; from experience, usually when 'heroics' are involved or priorities are skewed, it's ego to blame and not some external requirement.
Further, 'heroics' are context-dependent - if the external requirement actually requires what would be 'heroics' in a normal situation, 'heroics' are simply 'duty' in that case, and there exists a 'that case heroics' that would still be 'heroics' (and therefore indicative of likely-ego-driven skewed priorities)
Maybe you meant something more like "extreme" ?
Both can be true. You've no doubt seen the CEO/psychopath studies.
Founders building potentially billion dollar businesses (not $10m lifestyle companies) need to have a psychotic drive to achieve that goal.
That often creates tough work environments in the early stages of the company. To many people, failing to build that billion dollar company is the same as outright failing completely. They’ll do whatever it takes to get there. I’ve worked with engineers and designers that like this type of environment. I’ve worked with others that thought they did until it came time to actually pull an 80 hour week.
EDIT: Several downvotes, but only one reply. If you have issue with anything I said I'd appreciate a response.