The facts: There is lag. No other two ways about it.
Subjective: It isn't perceptible.
I don't care how YOU feel about the lag. It's not a fact for everyone else. Don't paint it as a fact. What you feel may not be the same for me.
Unless the ping is single digit, I, myself, will feel the difference. I suspect a bunch of others who play competitive MP will feel it as well especially people who are used to play on single digit ping. I recognize there are people who play on higher ping because of circumstances regarding their location that they can't control but I assure you 99% of them will prefer lower ping. The effect may not be pronounced but it is felt nonetheless.
There is lag and there will always be lag in game streaming. There's no two ways about it. I'm sorry you're offended of my enthusiast opinion on an enthusiast forum that I can't relate to casuals especially in competitive cases like Halo Infinite. Like I said earlier, I don't mind you streaming your SP games. Maybe you don't even mind having lag on MP at low ranks. Just don't think it will be prevalent in high ranks because every single advantage counts.