Actually.. it is a fifht strategy.. infact one of the most famous ones ever see Muhammed Alis rope a dope when he beat George Foreman. But I digress... if you have an excellent chin and big punch power you absolutely CAN force a brawl and absorb punishment looking for a KO. If you have the right tools to fight like that it can be extremely effective. Gaethje forces you into a brawl and can take the pain/damage and recover extremely fast. This coupled with his KO power mean that as long as he keeps you in a brawl he feels he will land and put you to sleep.
It makes perfect sense especially depending on who your opponent is. There are guys out there who we have seen.. even some ranked guys who would NOT recover once they are rocked and mentally check out of fights. Hell we also have seen fighters who dont have good chins and who can be knocked out.. if not quite easily unfortunately for some of them. If you have a wrestling background to keep it on the feet...a great chin/recovery ability and your tough as hell with big KO power in your fists you can argue against an opponent who wilts under pressure or who has a weak chin that a guy like Gaethje is a nightmare. He will force you into a brawl.. take your best shot and when it comes time he will finish with his power shots.
It absolutely is the correct strat against many guys.