the moon is actually not all that far away, its only a three days travel with near instantaneus comunication, right now the biggest limitation is that rockets take months of preparation to launch anything and you have a limited number of them but taking into account that spacex is right now able to launch with only a 2 week window and that starship will be much more capable than falcon 9 we could reach a point in the next 10 to 15 years were we are able to do daily missions to space or even multiple missions in the same day, it only took spacex 10 years to reach this current rate of launches after all

at that point responce times to any emergency happening on the moon would not really be any slower than the responce to emergencies on earth, a couple days at most which unless its a literal catastrophic emergency would be more than enough time for most stuff

this all sounds imposible right now, but so did reusable rockets launching once per week 10 years ago

mars will be far harder, i fully expect a mars landing in before 2050 but i do agree that full colonization will likely take longer

moon colonization i do see it much feasible, we already were able to put humans on the moon and keep them there safe for 12 days over 50 years ago, the moon is going to start colonization in the next couple of decades and that is just the first step