Yes, this thought crosses my mind quite frequently. It is a very saddening topic. It makes life seem absolutely pointless. Perhaps if our species was on the right track, this thought wouldn't be occurring. At least that's my view. I think, we as a species, are wasting our time and energy on things that don't matter. I think the colonization of other planets and space exploration should be our top two priorities. Instead it's money and power.
Need a soul mate!
I've often done that and still do.It can be a very humbling thought.Take pride in what you do and live for the moment.When it comes right to it ,all we have is ourselves.Family and friends can give you a sense of purpose at times like this.Don't give up,just enjoy the ride.Good Luck !