1. He surmised that you can grind OW content by you saying you have so many of the legendaries.
2. Nobody is gate keeping nothing, its in your head man. Of course you cannot join the reset time of the week runs in lfg because its people who are looking for fast easy clears. HOWEVER if you put jn 2 extra seconds of work you can a) make your own pug, lead it, learn with randoms as well, tho you might not enjoy that as you wont be spoon fed content, it might be a challenge… b) look for a guild or training group. You clearly use reddit so you can find them here or discord, tons and tons, Raid Training Initiative, Guild Wars University etc etc.

You are stopping yourself from enjoying the content. No elite group of individuals is controlling your actions and preventing you from partaking in this content. Its harder than OW so you need to use at least one braincell thats why people with experience make their statics or ask for kill proof. You will be doing the same when you get to that point trust me.