You are showing you don't understand care needs of adults and your lack of understanding and empathy is quite unpalatable.
You don't need to be old or ill in the way you think of an older person being fragile, vulnerable or ill with many conditions to need care or support (such as direct payments given by the local authority.
There is a fast increasing number of under 30s requiring social care for anxiety/depression /bipolar etc whereby they use direct payments (provided by social care from the local authority) to employ a carer of their choice to go out with them to be able to socialise, go to the shops, take part in their local community etc. Would that send you to dignitas?
People with disabilities can claim PIP,. and also care provided by local council to the give support for many disabilities whilst still being able to work full time. Would you go to dignitas because you had one of these disabilities, such as becoming paraplegic, or having lifelong cerebral palsy or developing a progressive neurological condition?
Or would you hop on that plane heading towards dignitas if a bacterial brain infection that caused blindness in your 50s meaning you needed care until you learnt how to do everyday things again, how to be independent again, such as using public transport to be able to go and get your hair cut, learning how to cook and clean safely, how to take care of household tasks and paperwork - all of which help is provided by various skilled sensory support professionals, carers and/or direct payments paid for by the local Council?
Why limit your choices of going to dignitas to when you're old and need some care?
Why not get it over and done with and save everyone else time, money and resources and go in your 30s, 40s or 50s if you are unfortunate enough to suffer any of the above or similar? You wouldn't want to draw your own line so early, so why try to do it for others when you don't understand what all this money is spent on?
Too many people have little understanding of being human.