we still need to prepare for the future that's comingI disagree, honestly. Not because I don't think all the things you're saying will happen will happen, but because of all the things that are also going to happen that we're not talking about, because we don't know what they are. Yes, tons of jobs are going away (although I think it'll be 10-20 years for most of these, not 3-5 years like many seem to think), but what new sectors, opportunities, jobs, etc. will be created? I'm an optimist, so I genuinely think we'll adjust and adapt. I think we'll end up with most people doing jobs that don't exist today.
I could be wrong though.
However, no one knows the future, and the prediction that tech will destroy more jobs than it creates has been made since the start of the industrial revolution. So you basically have to fall back on the claim that "this time it's different". Which has also been made repeatedly during that time period :)
But honestly, at the end of the day, it doesn't really matter whether we should prepare or not, because we won't. Not in America at least.
There is no chance in hell that our political system will get its act together in the next two decades to get ahead of this problem and put policies in place for a bad situation that's coming but hasn't arrived yet. Look at all the problems that we know are problems because we're already living through them that we won't even fix now. We just put patches in place (maybe) and keep kicking the can down the road. Seriously, if half the jobs in America get destroyed in the next 20 years, it'll take us 40 years (or violent revolution) to address it.