'Moving very, very fast' for me personally doesn't imply breakneck speed, burning bridges, breaking things, etc. You can still take time to think AND move quickly. Far too many (software) engineers can dwell endlessly on 'The Best Solution' and never get anything done.

That said, I'm pretty sure if you are a tech company, time and timing is of the essence to get your products to market and find out what needs to be changed asap.

Also, there will always be a never-ending backlog. That's why you make decisions and prioritise.