The trees are over 25 years, it's taller than a two storey building[1], it's getting harder to find someone who can bring down the coconuts as the article states and also to maintain the trees(debris). Many of our neighbours have removed their trees for the same reasons and we have started to contemplate it as well, but it's hard to think about as these trees are like our family members.
So, naturally I've thought of mechanical devices which could solve this problem, there have been numerous attempts to solve this problem by various institutions and independent inventors incl. use of robotics like in OP; but those without human intervention hasn't made it mainstream and only those devices which help a climber climb fast/safe has seen some success.