Well that's right my friend, if we look at it in terms of profit then it is clear that both options will still be profitable, but in my opinion there may be a difference in the amount of profit in this case where the option to rent will certainly be much more profitable than selling, but maybe the scenario is in the long term.
In the end, of course this also depends on how the apartment owner is, if as you said that the person does not want to take care of his apartment for a longer period then of course selling it is the right option.

For me, to be honest, I think I would prefer to rent it out rather than sell it, because after all it is a long-term source of income that can help me meet all my living needs until I retire, you will find a situation where your physical condition is no longer possible to work and this is the reason why I prefer to rent it out.