Everyone (indluding me) has been critical of Visma's tactics. Heck, Van Garderen and Bookwalter droned on and on about it today more than any other topic.
The one caveat I have is that Visma is not the type of team that says "Hey guys, to ride hard today for no reason, just to show everyone how hard we are, and to p!ss everyone off." They take the marginal gains approach to the fullest extent. They are an F1 team translated to cyclng. This is the team that took video of opponents, and analysed it in real time, to send messages to the team about the fatigue of those riders. There may be some guess work in what they are doing, but I would suggest that there is far more calculation than guessing. They have a plan. Their plan involves beating the best cyclist to ever throw his leg over a bike. The inherent risk in any plan to beat Teddy is that you can't beat Teddy, no matter what you do. Their plan may not work, but no plan will likely work if Teddy continues to be who he has been all season.
What I see is that I think they have decided that making things as hard for him and his team as possible, in hopes that their team will outlast them, energy wise. Also, Teddy is feeding into their plan in some ways. Just yesterday, he chased Jorgensen (logically so), but also came to the front when Campenarts tried to go with a break. UAE has decided that they won't allow any Visma's in the break. Visma's #1 plan may have been to get someone in the break, and when that didn't happen (with anyone of consequence), plan #2 was to make Teddy keep using energy and team, which they did. They are also letting their riders fall well back when they have given some of their effort, but not all of their effort.
I don't think any plan will ultimately beat Pog, if this year is any gauge, but Visma thinks there is a chance, and I will say that Pog in years past, has looked fresh as a daisy after early, mid, and late Tour stages...look at him the last 2 days...that ain't a daisy we're seeing. He looks like he's been in a battle. Sure, so does everyone on Visma (and UAE), but that is a difference. Also, Vingegaard looked pretty good after every stage, except the TT.
Call them stupid, as stupid they may be, but they could also be doing the only thing that might get them a win, and with the scientific approach they take to everything, I would submit they aren't flying blind.