That sounds like a pretty good life! But I think for someone 20 years your junior at the beginning of their career, they probably should be pushing themselves pretty hard.
But even for those of us who are more established, I think it can be a good thing to dial back our social lives from time to time and invest in building and maintaining our career capital. That is especially true if you find work boring. It is totally fine to be bored at work for a time, but long term that is a sign of stagnation. Stagnation, in turn, can leave you in a vulnerable place when market conditions turn for the worse.
But even for those of us who are more established, I think it can be a good thing to dial back our social lives from time to time and invest in building and maintaining our career capital. That is especially true if you find work boring. It is totally fine to be bored at work for a time, but long term that is a sign of stagnation. Stagnation, in turn, can leave you in a vulnerable place when market conditions turn for the worse.