Ok, so what's the alternative? It's easy to say "Don't do that!" But what model should the Jedi follow instead?
Keep in mind, they aren't cops, they aren't nurses. They are priests. They serve a god, whether in the Force or the notion of life itself, that they are asked to put first in all things. It's why they aren't just ordinary people with superpowers. They've vowed to live their life differently in pursuit of serving others.
And love is totally acceptable, by the by. Obi-wan loved Satine. He recognized that his calling was elsewhere and he sacrificed for that calling, but he still loved her. And his ability to accept her death when Maul killed her, to still grieve, still feel loss, but not be consumed by it is pretty much the quintessential application of the principle. He serves a higher purpose than himself.
Edit: Much more alarming to me is the fact that Luke seems to be adopting the PT Jedi approach towards monasticism and isolation. This isn't BoBF's fault, that goes back to TFA and TLJ. But that's the real failing of the PT Jedi Order. Separating themselves from those they serve, disconnecting not from individuals but from society as a whole. Cloistering. That inward looking, dogmatic worldview that left Sidious to plot and scheme while the Jedi failed to notice. Jedi shouldn't be trained at schools or academy's. They should be trained on the streets and spaceways, amongst those they are being asked to serve and sacrifice for.
