My anecdotal opinion - pure tech people don't usually make good founders because they are too realistic and grounded. A company needs a visionary, someone who

My anecdotal opinion - pure tech people don't usually make good founders because they are too realistic and grounded. A company needs a visionary, someone who is at times even blinded by their optimism and vision. You pair that visionary with a strong grounded realist, and they balance each other out. There are times when both are needed - to either take a leap of faith (risk) or mitigate/avoid risks. But this dynamic will also only work if these founders have good communication and respect towards each other, otherwise friction can turn into bitterness and resentment.