OP, I'm very sorry that you and your loved ones are facing this, it's a terribly daunting diagnosis. I'm 100% for bodily autonomy and believe this is entirely between you, possibly your supportive loved ones.

I won't say you should drag out unnecessary suffering so others will be more comfortable. I feel you should make whatever decision is right for you. Please look into locations with death with dignity laws, and get something in writing pretty quickly. If you're in the USA, you may have to plan for residence elsewhere, because our autonomy is rapidly being constricted.

Again, I'm terribly sorry, and wish you and your loved ones the best you can make of the situation.