This reminds me of a meme where there are two people shown side by side in a debate about euthanasia, the young dude is enthusiastically for, and the old dude against. The person who wrote this is quite obviously young and he thinks he will be able maintain his motivation to work indefinitely. That is not the case for most people in my observation. Sooner or later you'll want to down-shift at least, if not exit the rat race entirely, if you have such an option.