Not wanting to go to the ground is exactly why you should train for it. Defending a takedown cannot be done without physically as well as mentally learning the mechanics of takedowns. Learning to position properly and otherwise respond to a takedown (and any ground action that follows) will give you a better chance of getting back to your feet sooner. As for clinches, if you imagine they are merely the result of "sloppy technique", then all I can suggest is that you go to sources other than the YT vids you refer to.
I am trying to keep an open mind about MMA for SD. I guess I default to MMA=BJJ and I don't want to go the ground because I disagree with many on this site that all SD attacks and street fights go to the ground. That has not been my experience personally and you can watch many a YT fight where I see nothing more than a sloppy haymaker shot and then a clinch.........the clinch occurs because of sloppy technique IMO, maybe I am wrong?