For Bot Lane, why use Upgraded Red vs. Upgraded Yellow with Vision Version
I am trying to get better about warding and want to understand why it is recommended to use the upgraded "sweeper" vs the upgraded yellow that reveals stealth/green wards. I am mostly speaking from the perspective of the Support.
My line of thinking: The Red Trinket: Will sweep an area, reveal to you a ward or maybe two. -Best case scenario, you are able to take out a ward or even two in close vicinity with both ADC and Support hitting different wards. -Worst case scenario you are denied by the enemy team's harass and you get nothing out of it. Furthermore, if you do take out a ward, it can immediately be re-warded by enemy lane. Also, you may not have enough time to clear out multiple wards, like in dragon pit as the sweeper is only for a short time. Bonus: you can scan a large area and see there is no vision in the first place.
The Yellow Trinket Vision Version: Will put a vision ward that reveals everything in a vicinity, again one ward or multiple. -Best case scenario, you are able to take out all wards and have the vision ward sit there and continue providing vision until enemy team can take it out, or you use it somewhere else. If enemy team re-wards the area, you still can kill those wards. -Worst case scenario, enemy tries to deny you. Now here, there's a difference, they can't simply harass you away, as they also need to kill it. The vision ward takes 5 hits, while the wards it reveals (green wards) take 3 hits. So, you at least have a chance to kill their ward before yours dies. Bonus: Save a ton of gold not constantly buying pinks because they keep getting destroyed.
I know I just put out the best and worst case scenario and most games are a range of those. But the point is, I don't understand why sweeper is better for a support. If the argument is that the vision ward should be used in a place defensively, then the rest of your team can still buy a total of 4 vision wards and put them down. Furthermore, the support can use the vision ward to clear out stealth wards, and then go put a pink down where the "Defensive" ward should be.
I feel like I am missing something here and I want to know what it is. Thanks!