There can be some quite straight forward, correctable explanation why older people start dropping things,, tripping, stumbling, walking into things. Changes in sight and hearing.
The eyes and ears are constantly relaying vital info about distance, spatial awareness, balance, proximity to risks etc. In later life , both eyesight and hearing can decline so gradually that the person might barely notice .
You might check that your friends are up to date with eye and hearing tests in case impairment of one or both is the root cause of their accidents.
They don't need a GP referral to get eye and hearing tests. Both are FREE to people over 60, funded by the NHS, available at Boots and other High St businesses. Just make an appointment.