Not everyone shots competition, so no need for "standard" load sizes.
I quit 3 yrs ago with 80k registered sc targets. Now shoot for my enjoyment only. Love the 3/4 loads in my 20ga ou. Challenge my other "duffer" friends with their 12 bores & larger loads.
If you need to shoot larger loads have at it, I understand. Just let me enjoy my 3/4 fun loads.