But yes the floor of the launch pad is really not something to worry about, I mean we know how to build safe launch pads since decades, we just have to do so.
Because the same people previously developed Falcon 9 Block V, the safest and most reliable launcher on record?
But even more the way this has been handled, or rather not handled. There is so much that can fail. All in all I doubt it will happen soon.
I remember a few years ago, SpaceX was selling seats for the mars mission. But maybe that’s just the Elon-way of doing things.
Even if climate change gets way worse and we contaminate our environment way more then we do now and additionally to all that have some additional nuclear escalations: It still would be WAY easier for humanity to continue to survive on earth then it is to do so on mars.
Putting up a few human on a mini base on Mars, that's the _easy_ part. Even keeping that base alive for a few years is very easy compared to making the mars a viable/relevant option for humans future survival, and AFIKT that is still years, maybe decades away.
The martian soil is toxic and currently we are unable to use it for agriculture.
Low solar panel output plus sandstorms mean a lot of upkeep is needed to keep power up - or more realistically you need to deliver a nuclear reactor there. But... rockets do explode, do you want to experience nuclear fuel payload explode in earths atmosphere?
People on mars will have to live in underground dwellings to shield them from space radiation.
Different gravity in long term might have some unexpected side effects, especially pregnancy.
But then whats the point of it all... we are unable to create stable colony (plan b) there. Mining? Moon is closer and easier for that purpose.
It all sounds like a penal colony, no sane person will sign up for it.
AFAIK a journey to Mars will be a one way ticket.
The chance we would see a person standing on surface of mars is 0%, unless there is some revolutionary scientific/engineering breakthrough or an actual threat to life on earth.