A "Rum" start implying Candar, Karaman, Ramazan is significantly harder than Byz.
With Byz you can just build a few heavy ships and block the strait on normal and hard. If the Ottomans declare on you first, just restart. That isn't challenge to me. On VH it is actually a pretty tough start since you can't just block the strait. Then again, try Candar on VH without no CBing out of Anatolia and you'll be restarting 20 times until the Ottomans are friendly.
somehow in my games ottomans build enough galleys to kill my blocking heavies, that's if I get the fort in the first place, so it isn't all that straight; I tried budgetmonkey strat about 10 times on normal, all failures. It's neither easy, nor straightforward. Stars need to align for this start, just like others you mention. How many elite players are out there? 100? 1000? It's all easy for them.