Can we stop with the whole "just buy wards" excuse?
This is not season 2 or 3.
There are no 3 min stealth wards on the shop, and control wards are completely visible and you can only have 1 out at the time, basically you rely on 2 60s wards on a 180s cd in lane to cover 4~5 or even more possible gank paths, basically its just not possible for a laner to protect himself from being ganked by "buying wards".
So now, you cant just "buy wards" to protect yourself from a camp nowdays, so stop giving bad and outdated advice.