Should I give up and go by taxi

I use a stick because of my OA in my knee, since I started using it I find I am offered a seat 99% of the time on tubes and buses, it is a good visual sign of need to sit.

Regarding taxis, I know it is different but since lockdown and worsening OA, I have lost confidence in walking home so now take a bus or cab, I have always walked home after a night out so this is an unexpected consequence. You can always make up for the cabs with a trip to the gym or a swim.