Um... apologies but if I might venture - if the Royal Navy wasn't the size it was at the time of Jutland, then we'd have lost Jutland. Suggesting that because the then-massive Royal Navy 'Didn't really do us much good' is a bit akin to saying the RAF 'didn't do much good' in the Battle of Britain. They stopped the Germans invading.
There was a terrible loss of life on both sides, and for no apparent material gain. Which is basically a relatively accurate sum-up of War in general.
I fully respect your opinion BazaJT, and had both fleets basically sent out a telegram that morning and said 'look, we're an even match, shall we just leave War for today and just assume in any clash we'd get hundreds of our boys killed for no good reason' then that would have been the preferable option. Same with so many battles over so many centuries.
There was a famous bit of banter between the US and Royal Navy during some War games - something along the lines of "Hey there Cap'n ----, how's the World's second biggest Navy doing?" The reply from the Captain/Admiral whoever in the RN came-
"Very well, thank you. How's the world's second best?"
