There is no reason to turn off any sensors. It will land in your hand. Stop it's descent slightly above head high, place your raised and outstretched arm and hand under the drone and then hold down on the left stick until it lands in you hand...
Care Refresh is different than warranty. One cannot buy Care Refresh in the US for a M4P. DJI is not stocking parts in the US for the M4P currently due to customs. Many owners are buying 3rd party insurance to cover damage. State Farm is who...
You are correct at the current time. DJI is hoping to offer US based warranty service when they can get the M4P parts in country.
I have yet to need warranty service on any DJI product I have purchased.