I have no issue with somebody using a 223 to hunt if that is what they want, but some of the nonsense like you need to do so because recoil or spotting shots is silly and not relevant for hunting. If you can shoot your rifle well, whether a 300 or 223 then good to go. The fact you can shoot a 223 better for a 30 shot string is irrelevant. A 223 will eventually become obnoxious if shoot enough. Anybody with an older sibling who poked you in the same spot can tell you that

Spotting shots that drift left or right on steel is one thing. If that is happening to you hunting learn how to stalk and get closer vs thinking practice is going to help. The best PRS shooters who are world class at shooting and reading wind know this and use mild cartridges to spot shots. However, That is piss poor reason to use a cartridge for shooting animals and is at best a false sense of security for taking shots you should not