Professor Devi Sridhar is one of the scientific experts advising the Scottish government. She explains it well:
Two approaches: either keeping borders largely open like the UK, but adopting harsh domestic restrictions to try to combat community transmission; or having very tight border controls, like Taiwan and New Zealand, but few restrictions on everyday life.
And
On a panel with several CEOs yesterday and their message was clear -> it's the virus impacting consumer behaviour & their businesses, not just restrictions. Already clear that controlling the virus with a clear strategy is best route to economic recovery.