I’m saying there is more to it then just that, but simply speaking, yes you can do this.
I really don’t want to argue to much about this since you seem firm in your opinion. Totally fine! I think you can game the system though. With how MMR works, it can have a negative impact if you ‘level’ off relative to your rating. Part of the reason I made the alt hunter was to show just how much positive MMR I could generate while pushing. Winning successive low matches can translate as you move up.
For example…
If you’re an 1800 player and your last few games you go 50/50, your MMR levels off. What happens if instead, your last few games to 1800… you won all of them. You had some good queues, whatever. You’re still in the same range, but because you built up substantial padding in your MMR, you could now potentially take a loss or two with no loss to your CR and still push slightly higher. As I said, you’re not going to be far off from where your target CR likely will be, but you could probably push +100 or more.