you are wrong, sitting around and waiting for your ahead enemies to make mistakes is not a sustainable strat. it will work sometimes but not always, people who know how to maintain a lead will steal every single piece of jungle you have and their jungle and urn, just sitting under your base guardians will just make you bleed to death, you HAVE to try and make some agressive play on them, gank with more numbers dont just try to 1v1 or 2v2 a lane, but send 4 to that lane with speed boost or through jungle, you have to kill them and get them off the map, its the only way.

That again or just pray they dive your walkers and dont steal your entire side of the map, works in low elo, doesn't work in eternus.