The main thing I see alot is people wanting to immediately be at dragon, but lets say you have no side wave control mid is in middle of lane, even if you are stronger and as long as you aren't giving 5th drag there are times to just give the drag over, hell even 5th drag is not instant GG. Back to point, if you risk losing a ton if the fight goes wrong, why risk it? The biggest thing in soloQ or even ranked 5s is just not throwing, get your lead play it aggressive but try to minimize risk, if you have all lanes pushing and can be at drag then great do that, if not don't go "OMG top isn't here" because they are pushing a wave that could take tower, they are minimizing the risk, which will actually win you more games.
People focus so much on a dragon buff, when especially in soloQ the game timers are RARELY long enough for 5th drag, and if it gets to that point it is either one team unable to end despite being ahead and having multiple dragons stolen, sneaks, however the enemy team gets it or a team is facerolling and wants 5th drag just because, I can honestly not think of any situation where we needed 5th drag,
Also as far as giving away drag goes, it comes down to team comps, for example teams with terrible siege it is fine to give 2nd drag to because they will have a very hard time using it.