To add to this, the fact that India has to fall to colonisation, when up until at least the early 18th century, and even for a period during the 18th century, it could've been avoided had one or two big things and lots of small things turned on the other side of the coin.This certainly has an influence on the way people think about it, but I must add that once you look at it more closely it doesn't really add up... For example in North America both Jamestown and Plymouth could've very easily failed, they even were on the brink of doing so iotl, but by pure chance they both somehow managed to pull through. People on this forum would roll their eyes if you write something like how the 3rd supply of Jamestown arrived just in time to save the colony at the very last possible moment lol.
Or what about India? Any European power colonizing India would've seemed ASB for most of history. Then for a while it looked like as if anybody would do it it would be the French under Dupleix, who used their sepoy armies with great success in the 1st Carnatic War. But the war ended in a status quo ante bellum because the people back home decided some island off the coast of Canada was more important than Madras was. Then in the 2nd war the British somehow manage to install Muhammad Ali as Nawab, even though he was the underdog for most of that conflict and was at the brink of defeat several times. Luckily in the end someone coma up with an unconventional plan that lead to their victory... It just so happens that this person tried to shoot himself only a couple years prior, but his pistol misfired! What a coincidence. Not to mention that his plan would've been completely impossible if in 1748 the French had decided Madras was more important than the aforementioned Canadian island! (to add insult to injury the French ended up losing all of Canada anyways not much later)
These are just 2 examples of colonial ventures that could have very easily gone wrong (very big ones too). And the RN, or Britain being an island, had little (if anything) to do with it.